Monitoring and protecting device for foundation pit fence

The utility model relates to a monitoring protection device for a foundation pit fence, and belongs to the field of foundation pit protection, the monitoring protection device comprises a baffle, a fixing shaft, a limiting assembly and a positioning assembly, the baffle is hinged to the fixing shaft, and a plurality of insertion blocks are arranged on the baffle at intervals; a plurality of annular grooves are formed in the fixed shaft; the limiting assembly is arranged on the inserting block and used for limiting the inserting block in the annular groove. The positioning assembly is arranged on the fixing shaft and used for fixing the fixing shaft to a mounting position. A worker adjusts the to-be-installed baffle and the installed baffle to a proper angle, then the to-be-installed baffle continues to be moved so that the inserting block can be inserted into the annular groove, the inserting block is limited in the annular groove through the limiting assembly, and fixing between the to-be-installed baffle an