Abstract: In view of problem of non-ideal dust suppression effect on fully mechanized coal face, the paper proposed a design scheme of dust suppression device with dust source tracking and high pressure spray on fully mechanized coal face. Working principle of the device is as follows: when infrared receiver installed on one position of hydraulic support detects infrared signal sent by infrared emitter installed on body of shearer, controller of high pressure spray at the position uploads corresponding position information to main controller which downloads the information to all online controllers of high pressure spray which will judge whether open electromagnetic valve according to program and parameters set by main controller, then sprinklers are controlled to spray for dust suppression by electromagnetic valve. The actual application showed that the device runs well and reaches prospective goal.