The invention discloses a mite-removing dust collector with a telescopic rod. The mite-removing dust collector comprises a mite-removing dust collector body, a rotary block and the telescopic rod, wherein a handle is arranged on one side of the top of the mite-removing dust collector body, a signal receiver is arranged on one side of a fixed block, a stepping motor is in transmission connection with the rotary block through a transmission shaft, the top of the rotary block is rotationally connected with a rotating sleeve through a rotating shaft, and a holding rod is arranged at the top of thetelescopic rod. For the mite-removing dust collector with the telescopic rod, the fixed block is welded to one side of the mite-removing dust collector body, the stepping motor is fixedly connected to the interior of the fixed block, the stepping motor is in transmission connection with the rotary block through the transmission shaft, under the transmission effect of the stepping motor, the fixedblock can drive the mite-removing dust collector to perform position adjustment, so that the mite killing position can be flexibly adjusted when the mite-removing dust collector is used under a bed or in some small spaces, thus convenience is brought to life, and the mite killing efficiency is improved.