The structure and operational principle of a new tractor sewer pipeline dredging robot were introduced, and a control strategy was put forward based on digital signal processing (DSP) according to the working principle of robot. Controller for double brushless direct current (DC) motor about hardware and software was studied and designed, in which Viterbi, Complex Math and CRC Unit (VCU) and control rate accelerator (CLA) were used in the DSP microcontroller. The priciple diagram of relay output circuit of movement control of the robot was desgned. The wireless data transmission module based on ZigBee was established. The results show that the wireless data transmission and movement implement of dredging bucket are stable, and controlling effects of the double brushless DC motor are good.