Maurice W. Fillius, 77, a retired officer of the National Association of Beverage Importers and a championship golfer here during the 1950s, died of leukemia Thursday at Sibley Memorial Hospital.

Mr. Fillius joined the Old U.S. Tariff Commission, now the U.S. International Trade Commission, while earning a law degree from George Washington University.He then was an attorney with the commission until 1933, when he joined the National Association of Beverage Importers.He was general counsel, secretary and a vice president of the Association when he retired in 1967.

After his retirement, he practiced law in Washington.

A longtime member of the Columbia Country Club in Chevy Chase, Mr. Fillius won the D.C. Golf Association's senior championship in 1958. He also played on a 1950s Maryland State Championship golf team and was a past winner of the National Press Club golf tournament.

Born and reared in Washington, he graduated from McKinley Tech High Scool, where he was a member of the football team. He earned a bachelor's degree from Cornell University, where he was a member of the varsity rowing team.

Survivors include his wife, Frances, of Washington; a son, Dr. R. Walker of San Diego.; a daughter, Carolyn Ginnings of McLean, and three grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Leukemia Society of America in Washington.