The invention discloses an external jacket wall type water cooling brake pot. The pot comprises a brake pot body, a jacket wall cylinder, a jacket partition plate, a water inlet pipe and a water outlet pipe and is characterized in that the outer diameter wall of the brake pot body is connected with the jacket wall cylinder, a cooling jacket is formed between the outer diameter wall of the brake pot body and the jacket wall cylinder, the jacket partition plate is arranged in the cooling jacket, the cooling jacket is partitioned into a cooling water inlet cavity and a cooling water outlet cavity through the jacket partition plate, and a jacket water inlet and a jacket water outlet are formed in the two sides of the jacket partition plate, and are connected with a water inlet pipe and a water outlet pipe. The external jacket wall type water cooling brake pot achieves the aims that the simple technology method is adopted for solving the problems that a jacket is arranged in the brake pot wall, the machining technology is complex, and the problem of connection of a wear-resisting layer appears, and the brake pot has the beneficial effects that the simple technology manufacturing is adopted, and the problems that the brake pot is prone to cracking due to high temperature, connection of the wear-resisting layer is not firm, brake fails, and serious traffic accidents are caused are solved.