A vehicle brake parking device, comprising: a cylinder block, a cylinder base, a first piston assembly, a first release spring, a parking mechanism, and a cylinder head, wherein the cylinder block is arranged on the cylinder base, the cylinder head covers a side of the cylinder block away from the cylinder base, the cylinder block and the cylinder head form a first accommodating cavity, a first mounting hole is formed at a center of the cylinder head, the parking mechanism comprises a mounting base, a retaining member, and a booster assembly, wherein the mounting base is arranged on an end face of the cylinder head away from the cylinder block, a second mounting hole is formed at a position of the mounting base corresponding to the first mounting hole, and the retaining member is arranged in the second mounting hole, the first piston assembly comprises a first piston slidably connected in the first accommodating cavity, and a first piston rod which is in fixed connection with the first piston, wherein the first piston rod extends to an outside of the parking mechanism after successively penetrating the first mounting hole and the second mounting hole, the first release spring is sleeved on an outer circumference of the first piston rod, and has one end in connection with the first piston, and the other end in connection with the cylinder head; the outer circumference of the first piston rod is provided with an annular groove, which is configured for clamping the retaining member, the booster assembly is in connection with the mounting base, and is configured for pushing the retaining member out of the annular groove under an action of a gas pressure of a train pipe, such that the parking mechanism is in a released state, wherein the booster assembly is arranged to be perpendicular to the mounting base, the booster assembly comprises a booster body, and an air inlet and a third mounting hole that are respectively provided on two opposite ends of the booster body, and an end of the booster body provided with the third mounting hole is further provided with a limiting tube, wherein the limiting tube is mounted at an orifice of the third mounting hole, an outer diameter of a tube body gradually increases outwards in a shape of a step, a second accommodating cavity is formed by the third mounting hole and the limiting tube, and the air inlet is in communication with the second accommodating cavity through an air passage; and the second accommodating cavity is provided therein with a second piston, one end of the second piston faces a direction of the retaining member, and the booster body is provided with a first via hole in correspondence with the second piston, a position of the mounting base corresponding to the first via hole is provided with a second via hole, and the second accommodating cavity, the first via hole, and the second via hole are successively in communication with the second mounting hole, one end of a second piston rod of the second piston successively penetrates the first via hole and the second via hole, and abuts against the retaining member, gas in the train pipe successively enters the air inlet, the air passage, and the second accommodating cavity, hereby pushing the second piston to retract and pushing the second piston rod away from the retaining member, characterized in that the air passage is further provided therein with a filter. wherein the booster assembly is arranged to be perpendicular to the mounting base, the booster assembly comprises a booster body, and an air inlet and a third mounting hole that are respectively provided on two opposite ends of the booster body, and an end of the booster body provided with the third mounting hole is further provided with a limiting tube, wherein the limiting tube is mounted at an orifice of the third mounting hole, an outer diameter of a tube body gradually increases outwards in a shape of a step, a second accommodating cavity is formed by the third mounting hole and the limiting tube, and the air inlet is in communication with the second accommodating cavity through an air passage; and the second accommodating cavity is provided therein with a second piston, one end of the second piston faces a direction of the retaining member, and the booster body is provided with a first via hole in correspondence with the second piston, a position of the mounting base corresponding to the first via hole is provided with a second via hole, and the second accommodating cavity, the first via hole, and the second via hole are successively in communication with the second mounting hole, one end of a second piston rod of the second piston successively penetrates the first via hole and the second via hole, and abuts against the retaining member, gas in the train pipe successively enters the air inlet, the air passage, and the second accommodating cavity, hereby pushing the second piston to retract and pushing the second piston rod away from the retaining member, characterized in that the air passage is further provided therein with a filter.