Water circulation filter for thermal equipment

The invention relates to the technical field of water circulation filtration, and discloses a thermal equipment water circulation filter which comprises a main water pipe, flange plates arranged at the two ends of the main water pipe, a filter plate obliquely arranged in the middle of the main water pipe, a blow-off pipe arranged in the middle of the bottom of each flange plate, a cutoff mechanism and an auxiliary flushing mechanism. The cutoff mechanism comprises first water blocking rings which are arranged in the main water pipe and located on the left side and the right side of the filter plate, the first water blocking rings are of annular hollow structures, and first plugs matched with the first water blocking rings are arranged on the right sides of the first water blocking rings; the auxiliary flushing mechanism comprises water passing pipes arranged on the left side and the right side above the main water pipe, and the water passing pipe on the left side is arranged between the first water blocking r