Self-propelled lifts, with automatic walk-through capability, are free of external power, no manual pull, mobility is flexible, operational and easy to move up and down, with only one person able to move forward, back, turn, fast, slow to walk and down, save labour and effort. Specially applicable to a wide range of high-altitude operations such as stations, docks, airports, stadiums, large enterprises, etc., which are currently ideal operating equipment in the country