An omnibearing ash removal robot special for an insulator comprises two horizontally-arranged rectangular frames which are arranged up and down. Each rectangular frame comprises two frameworks; two first pen type electric push rods are arranged between the two frames; one end of each first pen type electric push rod is connected with the frame on one side through a rotating shaft; a motor is installed on the frame and can drive a first pen-type electric push rod to rotate and be opened through a rotating shaft, the other end of the first pen-type electric push rod is connected with the frame on the other side through a locking device, and the first pen-type electric push rod stretches out and draws back to achieve expansion and contraction of the rectangular frame so as to tightly hold orloosen an insulator. The utility model has simple and compact structure, is fixed on the insulator in an encircling manner, has good safety performance and reasonable weight distribution, improves themotion stability, and is small in overall volume and convenient to carry.