Retractable pendulum soot blower RLD/LPSB11 model, which works on the heated zone of soot blowers, especially the horizontal pipe model. During process, it swings forward along the pipe section, and the swinging angle is between 0-160 degrees. The efficient usage of purging medium has a good effect, which includes the low equipment failure rate. Thus, the product is widely used on the heating surface of the tail flue.