本发明涉及涵背施工设备技术领域，具体为一种公路桥梁用涵背回填夯实设备及其施工方法，包括底座和两个涵背单侧处理机构，还包括有：平衡件，所述平衡件设置在底座上，并与两个涵背单侧处理机构相连接，所述涵背单侧处理机构包括：连接架，所述连接架设置在底座一侧；移位件，所述移位件设置在底座上，夯实件，所述夯实件设置在连接架一侧，转动式给料部件，所述转动式给料部件设置在底座和连接架之间，此公路桥梁用涵背回填夯实设备及其施工方法，使得在工作人员对涵背两侧进行施工时，通过平衡件的设置，能够同步调节两个涵背单侧处理机构的位置，确保在回填夯实过程中两侧受力均匀，提高了工作的平衡性和稳定性。

The invention relates to the technical field of culvert back construction equipment, in particular to culvert back backfilling and tamping equipment for a highway bridge and a construction method thereof.The culvert back backfilling and tamping equipment for the highway bridge comprises a base and two culvert back single-side processing mechanisms and further comprises a balance part arranged on the base and connected with the two culvert back single-side processing mechanisms; the culvert back single-side processing mechanism comprises a connecting frame arranged on one side of the base; the culvert back backfilling and tamping equipment for the highway bridge comprises a base, a connecting frame arranged on the base, a shifting part arranged on the base, a tamping part arranged on one side of the connecting frame, and a rotary feeding part arranged between the base and the connecting frame. And through the arrangement of the balance piece, the positions of the two culvert back single-side processing mechanisms can be synchronously adjusted, it is ensured that the two sides are evenly stressed in the backfilling and tamping process, and the working balance and stability are improved.