A “green” interleaved active power factor correction (APFC) module is designed and realized with two interleaved APFC technology，and it has the characteristics of high power factor，small volume，high efficiency and low harmonics.Experimental results of 3500 W APFC module prototype show that stable output voltage can be obtained when the range of input voltage is 165 ~275 V AC，and the input current can track the input voltage well.The peak power factor reaches 0.998，and the peak efficiency reaches 96.9%.The experimental results verify that the interleaved APFC module is reliable and low-costing，and it has been used for power supply of high-power and medium-power laser.