The invention discloses a four-wheel-driving hybrid power system, and aims to overcome the problems that the current four-wheel-driving hybrid electric vehicle cannot realize the optimal control of anengine and the parking electricity generation cannot be realized. The four-wheel-driving hybrid power system comprises an engine, a planetary row, a number one motor, a number two motor, a number oneclutch, a number two clutch, a number three clutch, a number four clutch, a number one brake, a number two brake, a gear I, a gear II, a gear III, a gear IV, a gear V and a gear VI. According to thefour-wheel-driving hybrid power system disclosed by the invention, the engagement / separation condition of different clutches and a brake is controlled, different modes can be realized.