The invention relates to a rail-mounted push trolley with normally closed braking. The rail-mounted push trolley comprises frames, walking wheel assemblies, automatic brake linkage mechanisms, and regulating mechanisms; and the rail-mounted push trolley with the normally closed braking is provided with four separate walking wheel assemblies, brakes of walking wheels is set to a normally closed mode, the walking wheel assemblies and the frames at the same side are welded together, the frames at both sides form integrally through detachable connecting rods, and the synchronous action of brake mechanisms can be realized by pushing and releasing of hand push rods. The automatic brake linkage mechanisms can adjust the braking force by rotating nuts between brake connecting rods and drum brake deflector rods, and because both ends of the brake connecting rods adopt different hinged methods, the walking and braking functions of two-way push rods are realized. The rail-mounted push trolley with the normally closed braking is reasonable in structure, convenient to disassemble and assemble, safe and reliable, and high in practicability, can be used as an effective tool for transporting materials in railway track construction, and wide application value in railway construction industries is achieved.