Graded multi-pass dynamic compaction equipment for foundation

The utility model discloses a foundation grading multi-pass dynamic compaction device which comprises a U-shaped plate, the bottom of the U-shaped plate is fixedly connected with two bases, the U-shaped plate is provided with two sliding grooves, each sliding groove is internally provided with a sliding block connected with the inner wall of the sliding groove in a sliding mode, the two sliding blocks are jointly and fixedly connected with a lifting plate, and the lifting plate is fixedly connected with the base. The bottom of the lifting plate is fixedly connected with an electromagnet, an iron block is arranged below the electromagnet, and the bottom of the iron block is fixedly connected with a dynamic compaction stone. According to the utility model, the dynamic compaction stone can be driven by the motor to be lifted to different heights according to the actual condition of a foundation, so as to meet different use requirements; the danger caused by accidental falling of the dynamic compaction stone duri