Auxiliary device for preventing pit wall from collapsing for water supply and drainage construction

The utility model discloses an auxiliary device for preventing pit wall collapse for water supply and drainage construction, which comprises an auxiliary mounting frame and a pit wall supporting assembly, a length adjusting assembly for adjusting length is mounted on one side of the auxiliary mounting frame, the length adjusting assembly comprises a first bolt and an adjusting rod, the adjusting rod is mounted outside the first bolt, and the second bolt is mounted outside the adjusting rod. The pit wall supporting assemblies used for supporting the pit wall are installed at the front end and the rear end of the auxiliary installation frame, and each anti-sinking assembly comprises a foundation nail, a cup head bolt, a bearing, a ball head sliding rod and ball head sliding teeth. Compared with an existing common auxiliary device, the auxiliary device for preventing the pit wall from collapsing in the water supply and drainage construction has the advantages that a foundation nail is nailed into the ground, a c