Assistant Secretary of State Chester A. Crocker has gone to Angola for two days of talks aimed at "clarifying" new Angolan proposals for the withdrawal of Cuban troops from the country, State Department officials said yesterday.

Crocker seeks to "clarify certain ambiguities" in the Angolan government's most recent proposals for the Cuban withdrawal, department spokesman Charles E. Redman said yesterday when it was revealed that Crocker had arrived in Luanda over the weekend.

Less than two months ago, Crocker left Luanda describing talks then as a "waste of time" because of the inflexibility of the Angolan proposals.

But after talks with Cuban President Fidel Castro in Havana last month, Angolan President Eduardo dos Santos promised greater flexibility on the issue.

This was followed last month by a new set of proposals, which State Department officials have refused to divulge.

Dispatches from the official Angolan news agency Angop presented what a department official said was an "edited" version of the proposals that included a two-year deadline for removal of troops instead of the original three-year deadline proposed by Angola.

However, the Angolans have also proposed for the first time that the Cubans be involved in the talks and reiterated Luanda's insistence that any withdrawal of Cubans apply only to southern Angola.

"We cannot say if the proposals are good or bad. There are some interesting things in them, and that is what {Crocker} has gone to find out about," the U.S. official said.

There are an estimated 37,000 Cubans in Angola. The United States has demanded that they be sent home before it will consider diplomatic ties with Angola.

The withdrawal is linked to the independence of Namibia, presently administered by South Africa. South Africa has demanded that the Cubans be sent home before the implementation of a U.N. Security Council resolution aimed at achieving independence in Namibia.