The invention discloses an energy-saving type automobile sound insulation pad punching device, and relates to the field of automobile part machining. The device comprises a supporting top plate, a fixing mechanism, a supporting mechanism, a punching mechanism and a supporting bottom plate. The supporting top plate is opposite to the supporting bottom plate, the fixing mechanism is arranged at thebottom of the supporting top plate in a sliding mode, the supporting mechanism is arranged on the top of the supporting bottom plate in a sliding mode, the fixing mechanism comprise a first clamping device, a first telescopic device and a fixing device, the supporting mechanism comprises a second clamping device, a sleeve pipe arranged on the top of the second clamping device, a sliding column arranged in the sleeve pipe in a sliding mode and a fixing nut in threaded connection with the sleeve pipe. The punching mechanism comprises a third clamping device, a second telescopic device and a punching device body. The punching device body comprises a rotating mechanism arranged at the bottom of the second telescopic device and a drill bit in shaft connection with the rotating mechanism. Grinding teeth are arranged in the circumferential direction of the surface of the drill bit, and the punching device can fix, support and punch a sound insulation pad.