Automatic polishing device for watering cart casting and polishing technology of automatic polishing device

The automatic polishing device comprises a suspension carrying plate, supporting columns and first electric push rods, the supporting columns are installed at the two ends of the suspension carrying plate correspondingly, and installation bases are arranged at the lower ends of the supporting columns correspondingly. The automatic polishing device has the beneficial effects that through the design of a second electric push rod, a sliding piece and a second electric sliding rail, the automatic polishing device can adopt a movable clamping structure, the clamping structure of the automatic polishing device can be flexibly adjusted according to castings of different sizes, and therefore the use flexibility of the clamping structure of the automatic polishing device is improved; through the design of the electronic level meter and the work indicating lamp, the automatic grinding device can have a horizontal warning function, so that a worker can carry out horizontal prompting when a grinding tool is replaced or a