A total of 237 deputies backed Morawiecki’s Cabinet, formed after his Law and Justice (PiS) party, allied with two smaller groupings, secured a second term with a win in Poland's October 13 parliamentary elections.
Meanwhile, 214 deputies on Tuesday opposed the new Cabinet and three abstained during the vote in the lower house, where Law and Justice has a majority.
Earlier in the day Morawiecki delivered a major policy speech outlining his government's priorities.
He vowed to simplify the country’s tax system and to offer more support for small and medium-sized enterprises.
The prime minister stressed the importance of the family and traditional values, and said his government would offer extra support for parents with three or more children.
He also told deputies his government’s main aim was to make Poland “the best place to live in Europe.”
The new Cabinet was sworn into office on Friday during a ceremony at the presidential palace in Warsaw.
Morawiecki said earlier this month that his government would largely be a continuation of the previous one led by him.
Law and Justice leader Jarosław Kaczyński said ahead of the October parliamentary elections that his party would bring in a raft of new policies during the first 100 days of its next term in power.