The invention discloses a passive 
extrusion type pulse 
coal chip jet flow coal breaking pressure relief anti-reflection device and a use method thereof. The device mainly comprises an anchor stirrer,a water tank, a 
slurry pump, a pressure gauge, a pipeline, a rotary water 
tail, a drilling 
machine, a 
drill rod, an integrated 
drill bit, a dust collection cover, a dust collection pipeline, a 
coal chip box, a filter screen and a jet pump. According to the device, coal chips generated during drilling is used as an 
abrasive material, the 
slurry pump is used for pressurizing to form a passive 
extrusion type pulse high-pressure coal 
chip jet flow, the passive 
extrusion type pulse high-pressure coal chip 
jet flow passes through a 
nozzle of the integrated 
drill bit to be accelerated again, coal iseroded and broken, coal seam pressure relief and anti-reflection is carried put, the coal chips are used as the 
abrasive material to be taken conveniently and locally, underground environmental 
pollution can be reduced, and economic cost is saved; and in addition, the 
slurry pump is adopted to generate the pulse jet flow with adjustable 
pulse frequency, so that the problem that a 
current pulse jetflow is difficult to apply in the field is solved, the water 
cushion effect can be effectively avoided, and the coal breaking efficiency is improved.