The invention discloses a hydraulic nut shredder, which comprises a fuselage, a machine head and a control box. The fuselage includes a casing, a hydraulic motor, a hydraulic oil cylinder, a hydraulic oil tank, a storage battery and a current amplifier. There is a fixed sleeve, one end of the casing is provided with a rotary sleeve, the hydraulic cylinder is sleeved at one end of the fixed sleeve, and the hydraulic cylinder, hydraulic motor, hydraulic oil tank, battery and current amplifier are sleeved from left to right Located in the fixed casing, the machine head includes a crushing fixed frame, a combined pressing head and a self-locking discharge mechanism, and the crushing fixed frame is provided with a tapered guide rail and a rotary pin. The indenter of the cutting machine of the present invention adopts a docking type, with a built-in laser transmitter, which produces a shallow indentation by pressing the indenter on one side of the nut, and heats and softens the bottom of the indentation through the built-in laser irradiation, reducing the propulsion resistance of the hydraulic cylinder. This can quickly break the nut and prolong the service life of the hydraulic components.