The utility model discloses a linkage spraying system of a gangue raking machine, which comprises a gangue raking machine and an electromagnetic valve, wherein the electromagnetic valve is arranged on a bracket at the lower end of the machine body of the gangue raking machine; the electromagnetic valve is connected with a water pipe; water spray pipes are arranged on the two sides of the upper end of the gangue raking machine; a plurality of spray heads are arranged on the water spray pipe; and a counter-spray type dust remover is arranged at the upper end of an unloading chute of the gangue raking machine. According to the system disclosed by the utility model, the spraying is in linkage with the operation of a scraper bucket through the linkage spraying of the gangue raking machine, the process of the scraper bucket is almost completely covered, and the dust generated in the rake loading and unloading processes is effectively reduced.