Dr. Manuel Urrutia Lleo, the Cuban exile who is Fidel Castro's choice for President, yesterday repeated the rebel leader's assertion that a general strike is imminent in Cuba.

Dr. Urrutia addressed a meeting of about 700 Castro supporters at the Belvedere Hotel, 319 West Forty-eight Street.

The meeting was sponsored by the New York Twenty-Sixth of July Movement, Exiled Committee.  It was held in honor of Senora Esterlina Milanes, a school teacher and heroine of the rebel movement.  She told of being tortured by Government forces for refusing to give them information about rebel military movements.

Miss Frances Grant, secretary-general of the Inter-American Association for Democracy and Freedom, told the meeting that her organization was supporting Castro.