The utility model discloses a prefilter framed bent that shock -resistant V -arrangement was arranged, including framed bent subassembly, rubber seal, board -like prefilter, V -arrangement clamp plate, the framed bent subassembly includes side seal board, preceding shrouding, back shrouding and intermediate bottom that frame, fixed welding were arranged at the top underseal board of frame one side, a plurality of one -tenth V -arrangement, the front end of adjacent side seal board and the welding of preceding shrouding together, the rear end of adjacent side seal board and back shrouding welding together, the front end of two side seal boards of head and the tail and frame welding, preceding shrouding all welds together with pushing up the underseal board with the back shrouding, intermediate bottom welds between adjacent side seal board, the frame is fixed on the wall body, and the rubber seal setting is in installation department of frame and wall body, and board -like prefilter passes through the V -arrangement clamp plate to be fixed on the framed bent subassembly, is equipped with sealed pad between board -like prefilter and the framed bent subassembly. The utility model discloses be convenient for install, dismantle, safe and reliable, it is convenient to maintain, and the resistance is little, and the amount of wind is big, is applicable to the air pipe that the sectional area is little.