El-Beblawi's newly formed cabinet includes liberals and technocrats, including seven members of the previous government, Voice of America reported.
It does not, however, include any members of Islamist parties such as the Muslim Brotherhood.
Thousands of supporters of ousted president Mohamed Morsi, a member of the Brotherhood, have maintained a vigil at a Cairo square, demanding he be returned to office.
Clashes between Morsi supporters and security forces left seven people dead and more than 260 injured overnight Monday.
Earlier, a spokesman for the Muslim Brotherhood said the United States has failed to stand up for its principles concerning Morsi's ouster.
Gehad el-Haddad said the coup against Egypt's first democratically elected president was given the "legitimacy of recognition and continued military aid" by the United States, Ahram Online reported.
El-Haddad said the same thing happened when former President Hosni Mubarak was ousted in 2011.
"Either the U.S. is complicit in planning/executing the military coup or ha[s] come to welcome it," he said.
El-Haddad tweeted his comments after U.S. Deputy Secretary of State William Burns met with the man the Brotherhood accuses of leading the July 3 coup against Morsi, Army Chief Abdel-Fattah el-Sissi.
The Brotherhood and Morsi supporters are demanding that Morsi be reinstated and the constitution restored before they engage in talks.