The invention discloses a positive drive self-balancing type flip-flow screen comprising a fixed screen frame, a floating screen frame, suspension device assemblies, a main rack, a motor, a petal-shaped coupling and an eccentric shaft assembly. The fixed screen frame is installed on the main rack. The two side faces of the floating screen frame are connected with the fixed screen frame through thesuspension device assemblies correspondingly. Screen face crossbeams of the fixed screen frame and screen face crossbeams of the floating screen frame are arranged alternately. The motor is located on one side of the main rack. The eccentric shaft assembly is fixedly installed at the upper end of the fixed screen frame, and the installation center plane coincides with the center plane of the floating screen frame. The motor is connected with the eccentric shaft assembly through the petal-shaped coupling. The eccentric shaft assembly comprises an eccentric shaft, a transmission connection rodand the like. The motor drives the eccentric shaft to rotate. The eccentric shaft drives the transmission connection rod, and thus the transmission connection rod pushes the floating screen frame to do positive reciprocating swing motion relative to the fixed screen frame. The positive drive self-balancing type flip-flow screen is simple and reliable in structure, stable in operation, small in noise, high in work efficiency, low in energy consumption and high in practicability.