In MPS multi-electrode system, two or more welding arcs burning in one molten pool, the heat input is several times of single power supply. It greatly incases the welding productive because the amount of melting metal in a unit time is increased. 多电源多丝焊接工艺中几个焊丝在一个熔池内燃烧,总的热量输入是单丝焊接热量输入的若干倍,使单位时间内金属的熔化量大大提高,从而可以明显提高焊接生产率。