The invention relates to the field of dust removal in coal mining, in particular to a spraying ejection-type dusty airflow control method and device with a side suction function. Dust generated by coal cutting of a coal mining machine roller is physically blocked by the aid of a dust retaining curtain, dust airflow is ejected by tailwind sprayers arranged on cantilever rod, the cantilever rod anda coal mining machine are oppositely fixed, a side suction device is arranged on the lower portion of the cantilever rod, side suction covers are arranged in a dust concentration area, one part of dusty airflow is purified by the side suction device, the other part of dusty airflow is collectively ejected by the tailwind sprayers and the side suction device and transported along one side of coal wall, the device solves the problem that ejecting air volume is insufficient as an existing dusty airflow control device is limited by dust control length, and the concentration of dust at a driver ofthe coal mining machine and an air outlet side of a machine body is greatly reduced.