As part of an attempt to broaden the party's base, House and Senate Republican leaders announced yesterday formation of a legislative liaison committee to deal with issues and legislation of concern to blacks.

Jim Cummings, chairman of the National Black Republican Council, said it was "the first th ime the House and (Republican) leadership had met to establish a formal relationship with blacks."

He said the purpose of the committee was to "make sure the needs of blacks are addressed by Republicans" in Congress and described it as part of a continuing of black people toward in the Republican party."

Republican members of Congress and Members of the National Black Republican Council will serve on the committee House Republican Leader John Rhodes (Ariz) and Senate Republican Leader Howard Baker (Tenn.) also announced they will ask Republican policy committees in the House and Senate to form subcommittees to deal with black issues such as minority employment, enterprise, education and housing.

Rhodes said National Black Republican Council representatives would meet regularly with policy subcommittee members to fashion legislative priorities.

Republican National Comittee Chairman Bill Brock said President Carter and the Democrats had been taking blacks for granted. Brock said such Democratic measures as the Humphrey-Hawkins jobs bill had been "denuded of any substance" and black Americans had been "terribly abused" by Democrats.

Meanwhile, after a meeting with Carter at the White House, Rep. Parren Mitchell (D.Md.), chairman of the Congressional Black Caucus, said the caucus would undertake a monitor abuses of federal aid programs such as elementary and secondary abuses of ferderal aid programs such as elementary and secondary education programs and job programs under the Comprehensive Education and Training Act.