Downhole U-shaped beam support connecting frame used together with side discharging car

The utility model discloses a downhole U-shaped beam support connecting frame used together with a side discharging car. The downhole U-shaped beam support connecting frame comprises a frame-shaped frame body which is mounted on a bucket tooth of the side discharging car, wherein a base matched with the bucket tooth in an inserted way is arranged at the bottom of the frame body; a pipe barrel matched with the section of a U-shaped beam and provided with a supporting fork structure is arranged at the top of the frame body; two backing plates are obliquely arranged in the tube barrel along a fork wall; the upper part of the frame body is movably provided with a connecting rod by a pin shaft; the upper end of a bucket is provided with a press block used for locating the connecting rod; the press block comprises a press block II welded and fixed on the bucket; a press block I hinged on the press block II by a pin shaft is arranged above the press block II; corresponding threaded holes are formed on the other side