Composite material cover of locomotive gear speed changing box

The invention provides a composite material cover of a locomotive gear speed changing box. The composite material cover comprises an upper shell, a lower shell, a driving motor shaft opening, a traction shaft small-diameter shaft opening and a traction shaft large-diameter shaft opening, wherein the upper shell and the lower shell are fixedly connected to form a hollow housing, the driving motor shaft opening and the traction shaft small-diameter shaft opening are formed in the front surface of the housing, the traction shaft large-diameter shaft opening is formed in the rear surface of the housing, and a first sealing gasket groove, a second sealing gasket groove and a third sealing gasket groove are formed in the driving motor shaft opening, the traction shaft small-diameter shaft opening and the traction shaft large-diameter shaft opening correspondingly. The composite material cover solves the problems of heavy weight, easiness in corrosion, difficulty in maintenance, long installation time and high cost