The invention provides a unit brake cylinder cover shaping device, belongs to the technical field of vehicle brake cylinder manufacturing and mainly relates to a shaping tool. The unit brake cylinder cover shaping device aims to solve the problems that in the manufacturing process of a unit brake cylinder in the prior art, due to the fact that a tool device for shaping a unit brake cylinder cover does not exist, manual detecting and shaping needs to depend on manpower, work intensity is large and efficiency is low. A locating plate of the shaping device is vertically fixed to the upper portion of a vertical plate, a shaping and pressing device is arranged at the upper end of the locating plate, and the locating plate is of a segmental type. The unit brake cylinder cover shaping device saves labor cost and production cost, improves production efficiency, reduces the defective rate and greatly reduces potential safety hazards.