Based on large producing dust amount in fully mechanized process, which was serious threat to the employee's health and mine production safety situation, By analysis and research of 10102 working face dust production situation in Jinhui Rongtai Mine, long face along the groove hole water injection was adopted, which perfected the spray system and other measures, working face dust concentration decreased obviously. Especially for working face coal unloading zone and increasing the quantity of coal seam water injection hole and making full use of unloading zone of fracture implementation of long wall with water, which opened up a new thought for dustproof job of fully mechanized working face.