The new President confirmed he had signed an executive order stating the "great wall" will line the border with Mexico in a bid to stop criminals and drug traffickers entering America.
President Trump announced he will employ 5,000 new border security agents and begin a concerted effort to deport illegal immigrants and criminals back to their home country.
He blasted: "We want other countries to take back their criminals."
The 70-year-old also said "sanctuary cities" – those which are complicit in harbouring illegal immigrants – will see their federal funding drastically reduced.
Several watchtowers and aerial border patrols will be installed to slash the number of Mexicans flowing over the almost 2,000 mile border.
He said he would be "bringing back law and order to America".
Donald Trump has said the Mexican border wall will be built soon as he curbs immigration
In a briefing earlier this evening, the President's White House spokesman Sean Spicer outlined Trump's desire to catch, detain and deport illegal immigrants and foreign nationals who commit crimes upon entering the US.
Mr Spicer bullishly declared that their countries of origin will take the "criminals" back "no ifs no buts" and Trump's administration will give them "a one way ticket to their homeland".
He said: "They are going to get a one way ticket to their home countries and their governments will take them back.
"Federal agencies are going to unapologetically enforce the law, no ifs, no buts.
"We will target illegal immigrants for removal and return them.
"We will stop federal grant money for cities and states who harbour illegal immigrants.
"This is at the top of President Trump's priority and we will restore law and order.
Get Quotes on Home Insurance
"Building this barrier is more than just a campaign promise. It's a common sense first step to really securing our porous border
"This will stem the flow of drugs, crime, illegal immigration into the United States."
President Trump also signed an executive order restricting access into the US from the predominantly Muslim countries of Syria, Iraq, Iran, Libya, Somalia, Sudan, and Yemen as he seeks to reduce the number of Islamist inspired terrorists circumventing America's homeland security network.
The 70-year-old is making good on his campaign promise to tighten America's national security after saying some "bad hombres" were entering the US with ease due to the miles upon miles of largely unguarded Mexican border.
The construction of the "great wall" coincides with President Trump's promise to round up and eject "criminal aliens" and Mexican's "taking Americans' jobs".
President Trump, 70, repeatedly told his campaign rally attendees that he would recoup the cost of the wall from the Mexican government, which has in turn denied that it will pay for the property mogul's latest constriction project.
Mexican President Enrique Peña Nieto said: "It is evident that we have some differences with the new government of the United States, like the topic of the wall, that Mexico of course will not pay."
Sean Spicer, White House spokesman, said Trump will detain and deport illegal immigrants
President Trump has promised watchtowers, increased border controls and aerial surveillance to keep tabs on undocumented immigrants entering the United States.
He also reportedly wants to block visas being issued to individuals from Syria, Iraq, Iran, Libya, Somalia, Sudan, and Yemen.
Throughout his campaign, President Trump proposed a temporary ban on Muslims entering the US "until we find out what the hell is going on" when it comes to Islamist terror attacks.
The Republican told a rally in December 2015: "Donald J Trump is calling for a total and complete shutdown of Muslims entering the United States until our country’s representatives can figure out what the hell is going on.”
President Trump wants the wall built quickly to stop "bad hombres" entering the US
Express.co.uk contacted the Mexican government in relation to President Trump's border wall.
A spokesman said: "The president outlined 10 objectives that the Mexican government will seek in the negotiation with the United States:
"First: There must be a commitment by the US government to guarantee humane treatment and respect the rights of Mexican migrants.
"Second: The repatriation of undocumented migrants by the US government must be undertaken in an orderly, coordinated fashion, and the protocols that have been achieved must be maintained and improved. On the basis of decent, respectful treatment.
"The president recalled that the past three years have seen nearly three million deportations, and that "They were carried out in an orderly way, precisely because of the protocols we defined together".
"Third: “The development of the Mexican and US governments must assume a specific commitment to work together to promote the development of Central American countries,” he said.
The Mexican President, Enrique Nieto, has vowed to not pay for the wall
"He said that this commitment is increasingly important, because although the number of Mexican migrants to the United States has steadily declined, in the past three years, the flow of undocumented migrants crossing Mexico on their way to the United States has risen by over 100 per cent.
"Fourth: “We must ensure the free flow of remittances from Mexicans living in the United States, so that it is not hampered or made more expensive”. He declared that by November of last year, Mexicans’ remittances totaled over $24 billion USD. “This is an invaluable contribution to national development and essential for the support of millions of Mexican families, mainly those with limited resources".
"Fifth: The US government must assume the commitment to work in a jointly responsible fashion with Mexico, to stop the illegal entry of weapons and money of illicit origin. This situation claims thousands of lives every year in our country," he declared.
"Sixth: “We must preserve free trade between Canada, the United States and Mexico. Trade between the three countries must be free of any tariff or quota, as it has been since 2008. We wish to enhance the competitiveness of North America and its regional supply chains, by increasing Mexican exports to the United States and Canada on a basis healthy competition and the development of sectors with greater added value”.
"Seventh: The president declared that in modernising the North American trade framework, the governments must include new sectors such as telecommunications, energy and e-trade”.
"Eighth: He said that any new trade agreement with the United States must also translate into better salaries for Mexican workers. “Mexico does not compete in the world with low quality jobs or cheap labor".
"He said: "On the contrary, Mexico must participate in international trade on a basis of greater productivity and complementarity, making trade a powerful instrument to protect current jobs, create new jobs and improve salaries in Mexico."
"Ninth: "We must protect the investment flow to Mexico. We must ensure that our country remains an attractive, reliable investment destination; we will seek agreements that lend certainty to investment and trade between Mexico, Canada and the United States. We will defend national investments and those of any other country that has trusted in Mexico to invest in”.
"Tenth objective: “We will work for a border that links rather than dividing us. ”Although Mexico recognises the rights of any sovereign nation to guarantee its security, Mexico does not believe in walls. Our country believes in bridges, in highway and railway crossings and in the use of technology as the best allies, in order to become good neighbors."
President Peña Nieto declared: "It suits the United States for Mexico to do well and it also suits Mexico for the United States to do well."
Mexicans, he said, “Value the relationship we have forged over years and we know that if we work together, we can continue advancing in the right direction. North America has the potential to be the most competitive region in the world for the benefit of all its citizens. That is why we will continue working with Canada and the United States to achieve this”.
He said that forging the new relationship with the United States and the respective negotiation should be a job for everyone and not just the government and added that, "The negotiation must be accompanied and supported by state institutions, civil society and business and society in general".
The president said that, “The Senate’s accompaniment will be essential over the next few months, since the Chamber of Congress has the exclusive faculty to analyse the foreign policy developed by the president and approve the international treaties”.
He said that he has therefore instructed the Foreign Affairs and Economy Secretariats to remain in permanent contact with this representation.
He added: “Over the next few weeks and months, we will have to define the new rules of our relations with North America. Throughout this process, protecting Mexicans inside and outside the country will be the greatest priority. The president instructed the Foreign Affairs Secretariat, and particularly the Embassy and the consular network in the United States to redouble their efforts to provide consular protection and assistance, "To defend and assist Mexicans in asserting their rights in keeping with the law".