The invention relates to a motion 
mechanical energy storage and release device, in particular to an energy-saving lifting device which realizes smooth release by energy stored in a flat spiral spring. The device comprises a frame, an 
electric motor, a gear box, a loading box driven by a drum wire cable, and a 
drive shaft which drives the drum to rotate and is divided into a left section and a right section by the drum, wherein, one section is connected with the gear box by a 
clutch, and the other section is in parallel connection with a plurality of 
energy storage devices internally provided with the flat spiral springs by a plurality of the clutches. The 
energy storage device comprises a driven shaft, the flat spiral spring and the like, the driven shaft is a hollow shaft, the 
drive shaft passes through the driven shaft, the input end of the driven shaft is connected with the 
drive shaft by the 
clutch, after the 
clutch is closed, the driven shaft and the drive shaft synchronously rotate, thereby the 
energy storage devices can store or release energy when the loading box falls or rises. The device stores energy particularly when materials are unloaded in a mine and releases energy when the materials are lifted by the flat spiral spring, and the device has the advantages of 
high energy storage efficiency, stable lifting operation, being safe and reliable, and 
energy conservation.