Ellen Collins Conant, 63, a former government editorial analyst and associate editor of World Affairs magazine, died Saturday at Suburban Hospital after suffering a cerebral hemorrhage.

She had been an officer in charge of the division of manual, handbook and other training aids at the Central Intelligence Agency before retiring at the age of 50 because of declining health.

Mrs. Conant was assistant cultural attache at the American embassies in Quito, Ecuador, and Caracas, Venezuela, in 1943-46.

In 1947, she spent six months as special representative of the American Peace Society to the Security Council of the United Nations. She started work with the CIA later that year.

Mrs. Conant was named to the editorial board of the society's journal, World Affairs, in 1949 and served on the board as associate editor, vice chairman and executive secretary until 1961.

She was born in Waverly, N.Y. She graduated from Saint Joseph College in Emmitsburg, Md., and took graduate work at the University of San Marcos in Lima, Peru, the National University of Mexico, and the Georgetown University Institute of Languages and Linguistics. She spoke French and Spanish fluently and also studied Russian.

Mrs. Conant had received numerous awards during her career, including honors from the governments of Haiti and Spain and an honorary doctorate from the University of Santo Domingo in the Dominican Republic.

In 1963, she married Dr. James S. Conant, chief of surgical services at Glenn Dale Hospital, then the District's tuberculosis sanitorium. He died in 1967.

She is survived by a brother, Edward R. Collins, of Gibson Island, Md. CAPTION: Picture, ELLEN COLLINS CONANT, 1958 Photo