The invention relates to a multipurpose acarus removing dust collector, which comprises a dust collector main body, wherein an annular groove is formed in the upper surface of the dust collector mainbody; a rotary rod, which is matched with the annular groove, is arranged in the annular groove, and the rotary rod is rotatably connected to groove bottom of the annular groove via a bearing; two clamping grooves, which are symmetrical around the position of the rotary rod, are formed in the inner sidewall of the annular groove; springs are fixedly connected to the groove bottoms of the clampinggrooves; clamping blocks, which are matched with the clamping grooves, are fixedly connected to the ends, away from the groove bottoms of the clamping grooves, of the springs, and the clamping blocksare slidingly connected to the clamping grooves; the ends, away from the springs, of the clamping blocks penetrate notches of the clamping grooves and arc-shaped limiting blocks are fixedly connectedto the ends; a plurality of arc-shaped grooves, which are uniformly distributed, are formed in the outer sidewall of the rotary rod, and the arc-shaped grooves are matched with the arc-shaped limitingblocks; and the ends, away from the clamping blocks, of the arc-shaped limiting blocks are clamped with the corresponding arc-shaped grooves. The acarus removing dust collector provided by the invention can be adjusted in accordance with users' demands, so as to meet people's requirements and facilitate the people in use.