The utility model provides a colliery mist spray dust removal system, including the filter, water intake pipe, spraying pipeline and back flush pipeline, the upper end of filter is equipped with the water inlet, the water inlet is linked together with the water source through water intake pipe, be equipped with the delivery port on the lateral wall of filter, spraying pipeline passes through ball valve and delivery port intercommunication, the lower extreme of filter is equipped with the back flush export, back flush pipeline through crosses stop valve and back flush export intercommunication, spraying pipeline is last to install little spray painting head along its length direction interval, little spray painting head passes through quick -operation joint and can dismantle with spraying pipeline and be connected. The utility model discloses can filter the impurity of effective absorption aquatic to the water of inlet tube to when the absorbent impurity of filter was more, increase of service life was netted to simple, efficient towards filter wash. Spraying pipeline connects the convenience with little spray painting head in addition, does not receive the influence of roadway section and shape during the use, and dust removal effect is good, has reduced and has maintained the number of times, has prolonged the life of mist spray dust removal system, is worth promoting.