The invention relates a gear case, in particular to a hydraulic multi-head output gear case with multi-head branch output, and the hydraulic multi-head output gear case can be hydraulically and respectively controlled and can clutch, decelerate and accelerate. An input and output mechanism, an oil pump transmission mechanism, a driving mechanism, a bilge pump transmission mechanism, a self oil pump transmission mechanism and a water pump mechanism are arranged in the case body. The invention can be used for integrating all kinds of structures, solve an arrangement method when all kinds of structures are integrated and meet different needs.