In view of the double wire double arc welding process requirement,taking the characteristics and application of double wire double arc welding equipment of a company as an example,through the welding test,it is concluded that when the double wire double arc welding is used to weld the steel plate with the thickness of 20 mm or less,the groove and double-sided welding can be avoided,the direct current of the front welding wire can ensure the penetration,the alternating current of the back welding wire can ensure the deposition,and the good weld formation and welding quality can be obtained at a higher welding speed It is applicable to the welding of ordinary carbon steel and high-strength steel plate in medium and thick plates.