Abstract. In the era of technology gradually into the home, sweeping robots have become a must for many families. However, due to the lack of algorithms in the robot itself, there are still many problems with sweeping robots. In order to save cost and improve efficiency, it is necessary to improve the algorithm of robot coverage path planning. In this paper, we study the robot to complete full-area coverage path planning using sensors in an unknown environment. In this paper, the wavefront algorithm is combined with the traditional zigzag full-area path planning algorithm. The authors find that the combined algorithm speeds up the sweeping and reduces the repetition rate. Combining several different algorithms together like this can have more different applications in real life.