The invention discloses an irrigation spraying head which comprises a water entering pipe, a spraying body and a screw cap, wherein the screw cap is arranged at the top of the spraying body in a sleeving manner, and can rotate at the top of the spraying body; a spraying body rotating valve is arranged on the water entering pipe; the spraying body rotates through the spraying body rotating valve; liquid inlets and air inlets are formed in the spraying body; an air-liquid mixing cavity is formed in the top of the spraying body; liquid outlets are formed in the top of the air-liquid mixing cavity; the liquid inlets and the air inlets communicate with the air-liquid mixing cavity; and a circular hole for enabling the air-liquid mixing cavity to penetrate through is formed in the screw cap. The spraying head disclosed by the invention is good in diffusing effect, long in spraying distance and large in coverage area.