Mr Davis rubbished claims he had lost focus on the UK’s withdrawal from the European Union.
The Tory politician reiterated a win for the Conservative party would strengthen Theresa May’s hand in upcoming negotiations with the Brussels bloc.
Speaking on Channel 4 News from Wednesday’s BBC leaders debate in Cambridge, Mr Davis said the June 8 election was “not at all” a distraction.
After asking whether the Brexit secretary was working on Monday, presenter Krishnan Guru-Murthy highlighted the issuing of two European Union negotiation documents.
He said: “You’d have thought that you as the Brexit secretary were sitting down to have a look at them and read them.”
David Davis said the upcoming General Election was not a distraction to Brexit
It’s the wonders of modern technology Mr Guru-Murthy that you can actually read things on iPads on the train
But Mr Davis rejected the claim and snapped back at the presenter.
“It’s the wonders of modern technology Mr Guru-Murthy that you can actually read things on iPads on the train,” he said.
“I do read them on the train and that’s what we did that day.
“I know the point you’re trying to make, but you’re failing to make.”
Guru-Murthy then attempted to put the Tory politician on the spot as he said the election was a “huge distraction”.
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He said: “This election has been a huge distraction to your job of preparing for Brexit and the negotiations begin in 11 days after the election.”
But Mr Davis replied: “Not at all. Would you like the answer? One of the points of this election is to reinforce Theresa May’s hand.
“So 11 days after this election is over, when she goes, if she’s elected prime minister and you’ve made some points about surveys today, but if she’s elected and she is our representative, she’ll be there fully prepared with ten months of preparation behind her and she’ll have a mandate to carry out the negotiation in the way she has described.”
The Conservatives will lose their outright majority clinched by David Cameron in 2015 in the upcoming June 8 election, a YouGov projection has claimed.
The TV election debate – in pictures Wed, May 31, 2017
The televised debate saw Jeremy Corbyn, Amber Rudd, Paul Nuttall, Caroline Lucas, Angus Robertson, Tim Farron and Leanne Wood go toe-to-toe
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The politicians taking part in the debate
The calamitous news for the prime minister comes from the first seat by seat projection for the campaign, which suggests the Conservatives will fall 16 seats short of an overall majority. The polling method has taken into account an unusual technique using a complex computer model.
The YouGov prediction would leave Mrs May with 310 MPs – 20 fewer than at the time of dissolution of the last Parliament – while Labour are set to surge from 229 to 257 MPs on June 8 election, a gain of 28 seats in the Commons.
The scenario could leave Mrs May’s hand weakened ahead of Brexit negotiations – or see her ousted by an opposing coalition government.