The embodiment of the invention provides a brake, a passenger cable car braking system and a braking method, and relates to the technical field of cable car braking. The brake provided by the embodiment of the invention comprises a bracket, a sliding sleeve, a friction disc, an oil cylinder and a disc spring, the sliding sleeve is slidably arranged on the support, and the friction disc is fixedly connected to the sliding sleeve, so that the friction disc moves relative to the support along with the sliding sleeve. The oil cylinder is arranged at the end, away from the friction disc, of the sliding sleeve, pulling force pointing to the oil cylinder from the friction disc is applied to the sliding sleeve through the oil cylinder, the oil cylinder and the friction disc are located at the two ends of the sliding sleeve respectively, hydraulic oil leaked from the oil cylinder cannot flow to the friction disc, and the friction braking performance of the friction disc is guaranteed. Meanwhile, the oil cylinder comprises a cylinder sleeve and a piston, the cylinder sleeve is movably connected with the support, the pre-pressure of the disc spring is adjusted through movement of the cylinder sleeve relative to the support, it is guaranteed that the braking force of the brake meets the requirement, and then the braking effect of the brake is guaranteed.