Addressing lawmakers at a parliamentary session Wednesday, Kravchuk warned Ukraine "is on the brink of civil war."
A surge of violent demonstrations began this month after the Ukrainian government enacted laws restricting protests.
"The protests have turned into a revolt," Kravchuk said.
"I propose to create a commission and start the process of reforming the state," he added.
Meanwhile, members of the EuroMaidan group persuaded offshoot militant group Spilna Sprava to halt the takeover of government buildings as part of the protest, the Kiev Post reported.
The Spilna Sprava members abandoned control of the Agricultural Ministry, though about half a dozen state-owned buildings remain in the hands of EuroMaidan supporters.