This machine uses four independent steel ropes to do traction and traction drive. Comparing with traditional hoist, the possibility of rope broken is less, and this machine guarantees no overshooting. The safety devices for preventing falling, stopping and control position of up and down were well installed. The machine cage can be stopped on each floor, which controlled by digital circuit. The control buttons are placed under diaphragm type servomotor panels, which is waterproof and dustproof. TV monitor and intercom are installed, so the operators can know well the working status of machine cage in time. This machine is an ideal lift equipment, which has below advantages: easy operation, low noise, good lift speed and electricity saving.