The invention discloses a brake for hydrostatic drive, and relates to engineering machinery field. The brake comprises cylinder body, piston group, and power take-off shaft having left-end internal spline, right-end internal spline and top-end spline connected with friction pair, wherein the stop collar is set on the both side of the top-end spline; the friction pair comprises friction plate and steel sheet, and the pressure-bearing disc is set on the both sides of the friction pair; a steel bushing is connected with one end of the cylinder body, and the gland is pressing and jointing with the end face of the steel bushing; a spring is installed in the inner side of the gland, one end of the spring is pressing and jointing with the gland, and the other end of the spring is pressing and jointing on the pressure-bearing disc; the cylinder has oil path hole and oil cavity, the piston group comprises piston and push rod, one end of the push rod is connected with the piston, and the other end of the push rod is installed in the groove of the pressure-bearing disc; the friction plate and pressure-bearing disc is connected with the steel bushing through the spline inside the steel bushing, and the steel sheet is connected with the power take-off shaft through the top-end spline. The invention can solve the problems such as complex brake processing, assembly and maintenance, easy-to-wear and high cost of the piston.