Sewage treatment intercepting and filtering grid

The invention relates to an intercepting and filtering grid for sewage treatment. The device comprises a first grid assembly, a filter screen B, a filter screen C, a connecting sleeve, a connecting rod, a spring and a water collecting assembly, the first grid assembly, the filter screen B and the filter screen C are sleeved on the connecting rod in through the connecting sleeve, the outer wall ofthe connecting rod is sleeved with the spring, the spring and the connecting sleeve are distributed in a staggered manner relative to the connecting rod, water collecting assemblies are arranged at the circumferential position of one side of the first grid assembly at equal intervals; connecting sleeves are symmetrically welded to the outer wall of the first fixing ring. Convex grooves are formedin the first fixing ring and the second fixing ring; a rotating ring is placed in the convex groove; and the side wall of the convex groove located in the second fixing ring communicates with a wateroutlet hole d, a filter scr