The invention discloses a multifunctional composite space gymnasium which comprises a competition hall and a training hall, wherein a movable partition wall is arranged between the competition hall and the training hall. When the competition hall and the training hall are independently used, the movable partition wall is in a closed state. When the competition hall and the training hall are used together, the movable partition wall is in an open state, and the competition hall and the training hall are communicated to form a composite space field. According to the multifunctional composite space gymnasium, three faces are utilized to fix a reserved open face of a stand, a competition space and a training space are arranged adjacently, therefore multifunctional purposes of space composition of the gymnasium are achieved, various needs for artistic performances, convention and exhibition, fitness, entertainment and the like except regulation games, of current gymnasium buildings, are achieved, the purpose of maximizing of economic benefits, social benefits and environment benefits is achieved, and development of sports body-building activities for common people is benefited.