The invention discloses a driving lubricating brake cylinder for a vehicle. The driving lubricating brake cylinder for the vehicle comprises a cylinder seat assembly, a piston assembly and a cylinder assembly. A clutch which is arranged in the bottom of the piston assembly comprises a nut, a screw, a clutch disc and a clutch ring; the nut is arranged in the bottom of the piston assembly and is relatively fixed to the piston assembly all the way, the screw penetrates through the nut and is engaged to the nut, the clutch disc is fixedly connected to one end of the screw while a limiting structure correspondingly matched with the end surface of the nut is arranged at the other end of the screw, an elastic part is arranged between the clutch disc and the nut, and the clutch ring is arranged in the bottom of the cylinder assembly and is correspondingly matched with the clutch disc. When the brake cylinder disclosed by the invention is alleviated, the piston assembly can rotate at a certain angle through the clutch; grease falling into the bottom of the brake cylinder can be driven to the upper portion of the brake cylinder by rotation of the piston assembly, so that the lubricating state of a piston is kept, the service life of the brake cylinder is effectively prolonged, and the brake stability of the brake cylinder is guaranteed.