Folding filter element capable of accurately fixing fold distance

The utility model relates to a folding type filter element capable of accurately fixing a fold distance. The filter element mainly solves the technical problems that folds of an existing folding filter element are easy to press tightly, the backwashing difficulty is high, the backwashing effect is poor, and fine, thorough and reliable backwashing is not easy to realize. According to the technical scheme, the folding type filter element capable of accurately fixing the fold distance comprises two end covers, a folding filter material, an inner supporting cylinder, an outer supporting cylinder and a sealing ring, and further comprises a plurality of inner supporting pieces and a plurality of outer supporting pieces, one inner supporting piece or one outer supporting piece is arranged in each folding gap of the folding filter material, and the inner supporting pieces or the outer supporting pieces are connected with the sealing ring. The inner supporting piece is located in a folding gap between the inner suppor