Britain is due to leave the European Union on January 31, but will remain in a transitional arrangement until the end of the year.
Queen Elizabeth II will open parliament in a lavish ceremony on Thursday.
Johnson plans to pass a law guaranteeing that Britain's Brexit transition period cannot run beyond the end of 2020.
Prime Minister Boris Johnson promised to "get Brexit done" by taking Britain out of the European Union by January 31.
The removal of uncertainty surrounding Brexit allowed markets to breathe a huge sigh of relief.
The veteran socialist blamed the media for helping to cause his century-old party's worst finish since before World War II.
The Parliament will now be free to approve the divorce deal Johnson struck with Brussels so that Britain can leave without any more delays on January 31.
After months of high-level talks, negotiators presented the president with a deal that will see China ramp up its purchases of agricultural goods.
He will be able to get the divorce deal he struck with Brussels through parliament in time to meet the January 31 deadline.
Johnson says Brexit will free up the new government to concentrate on trying to grow the stalled economy.
Johnson's Conservative party had secured 362 seats -- its biggest majority since the heyday of Margaret Thatcher in the 1980s.
An exit poll after voting ended on Thursday night suggested a large majority for Prime Minister Boris Johnson's Conservatives.
Johnson had promised to forge a Canada-style free trade agreement with the EU.
The British exit poll suggested the Conservatives would win 368 seats in the 650-seat parliament, with the main opposition Labour party trailing on 191.
The Conservative leader campaigned relentlessly on a promise to "Get Brexit Done", by finally taking Britain out of the European Union next month.
The Conservatives were forecast to win a thumping 368 out of 650 seats in parliament.
The first indication of the overall result will come in an exit poll at 2200 GMT
Thursday's snap general election has been called in a bid to break the Brexit deadlock.
Johnson is hoping to regain the Conservative majority lost by his predecessor Theresa May in the last election.
The British prime minister has not been seen publicly with his girlfriend Carrie Symonds in over a month.
The state-run National Health Service (NHS) provides free taxpayer-funded treatment for all, which is often criticised but fiercely defended.
More than 1,200 food banks handed out a record 823,145 emergency parcels.