Groove excavation supporting device for water conservancy project

The utility model discloses a trench excavation supporting device for a water conservancy project, belongs to the technical field of water conservancy projects, and aims to solve the problems that after a trench is excavated, the slope supporting operation of the trench is inconvenient to adjust, and the supporting stability is poorer, the trench excavation supporting device comprises a placing frame, and a cover plate is fixed on the top surface of the placing frame; four symmetrically-distributed inserting columns are fixed to the bottom face of the containing frame, a rotating shaft is rotationally connected to the inner wall of the containing frame, and an adjusting gear fixedly connected with the outer surface of the rotating shaft in a sleeving mode is arranged on the inner wall of the containing frame; the abutting base plates on the two sides move to the connecting position of the bottom face of the groove and the side slope through rotation of the rotating wheels to be subjected to abutting treatment