The screw jack is a fundamental lifting component featuring a square groove housing that enhances the heat dissipation capability of the shell and extends the lifespan of the lubricating grease. It operates at 30% capacity, and if the load is relatively low, the operating rate can be appropriately increased. The precision positioning, with the addition of a backlash compensation device, achieves accuracy down to 0.05mm. The lifting speed is less than 1500mm/min (23mm/s), reaching up to 46mm/s in special conditions. One motor can simultaneously drive multiple screw jacks for mechanical synchronization. The stroke can reach 8m, taking into consideration the stability of the screw and the guide mechanism. It boasts simple operation and maintenance, low noise, and many other advantages.