According to the national standard Nickel Sulfamate for Electroplating，GB/T 23847—2017，the mass concentra tion of nickel in the nickel sulfamate product is 180 g/L，and the mass concentration of sulfate is not higher than 700 mg/L.A gasliquid mixing device was explored to disperse oxygen in an aqueous solution of sulfamic acid on a micron scale to increase the gasliquid contact area.The process of preparing nickel sulfamate by gasliquid emulsification method for increasing the dissolved gas volume of oxygen to increase the oxidizing property of the system and thereby accelerating the reaction speed.Effects of the reaction pressure，the reaction temperature，the gasliquid ratio of oxygen to sulfamic acid solution on the reac tion time and the sulfate in the product were researched.Then the best single factor process conditions were obtained，the or thogonal experiment was carried out，and the best process conditions were obtained as follows：the gasliquid ratio of oxygen to sulfamic acid solution was 1∶1，the reaction temperature was 30 ℃，and the reaction pressure was 0.45 MPa.