Alwyn F. Matthews, 60, former executive director of the Democratic Senate Campaign Committee, died of pneumonia Wednesday in the Veterans Administration Hospital in Perry Point, Md.

He was appointed executive director in 1956 by the committee's then chairman, senator George A. Smathers (D. Fla.). Mr. Matthews served as executive director under four campaign chairmen for 12 years.

During these years he helped supervise research, wrote speeches and helped develop position papers for the Democrats. He also worked on committe fund-raising projects.

Mr. Matthews also worked as a fund-raiser for Hubert Humphrey's presidential campaign in 1968.

After leaving the Senate campaign committee, Mr. Matthews founded his own legislative and business consulting firm. He retired two years ago for reasons of health.

He was a native of Long Island and served in the Army during World War II.

He worked as a reporter for Newsday and the Miami Daily News, and as a sportscaster for WTVJ-TV in Miami before joining Smathers' Senate campaign in 1950.

Mr. Matthews worked as a public information officer for the Office of Price Stabilization from 1951 to 1953, then managed his own public relations firm before joining the Democratic Senate Campaign Committee.

He was a founder of the National Capitol Democratic Club and had been a trustee of the U.S. Naval Academy Foundation.

Survivors include a brother Clay, of Washington and a sister, Jacqueline Streitburger, of Bedford, N.H.