Oil drainage device for static hydraulic driving device

The utility model relates to an oil drainage device for a static hydraulic driving device. The oil drainage device for the static hydraulic driving device comprises an outer shell body and a centersection arranged in the outer shell body. The centersection is provided with a decompression valve hole which leads to a high pressure oil chamber, the decompression valve hole is provided with a one-way valve seat. The one-way valve core is installed in the one-way valve seat, a driving valve rod of the one-way valve core stretches out the one-way valve seat, an extended end of the driving valve rod is connected with a driving device through a connecting piece in a transmission mode, and the driving device is arranged in the outer shell body in a penetrating mode. The oil drainage device for the static hydraulic driving device is reasonable in design, simple in structure, reliable in work, and long in service life.