The invention discloses a simulation system for a diaphragm spring of a clutch, which comprises an electronic control unit, a hydraulic control subsystem and a clutch control subsystem, wherein the hydraulic control subsystem comprises an oil tank, a constant delivery pump and a motor; the clutch control subsystem comprises a clutch control cylinder, a first pressure sensor arranged on the clutchcontrol cylinder, and a proportional pressure valve arranged on the clutch control cylinder and used for controlling the pressure in the clutch control cylinder according to a differential value between the actual pressure in the clutch control cylinder and the preset target pressure so as to make the controlled actual pressure reach the target pressure; and the target pressure serves as load resistance of the diaphragm spring of the clutch. Compared with the prior art, the simulation system for the diaphragm spring of the clutch can simulate load resistance of different types of diaphragm springs of clutches.