The vertical lift freight elevator has the safety device of the traditional traction elevator. It also has: overflow valve: it can prevent the system pressure from being too high when moving up. Emergency manual valve: when the power supply fails, the car can be lowered urgently. Open the door to the nearest floor, manual pump: When the system fails, the manual pump can be operated to pump high pressure oil to raise the car to the nearest floor position; Pipeline rupture valve: When the hydraulic system is broken, the car stalls down. When the oil line is automatically cut off, the oil tank oil temperature protection: When the oil temperature in the fuel tank exceeds the standard set value, the oil temperature protection device generates a signal, suspending the elevator use, and the elevator can be started when the oil temperature drops.