The invention relates to UPS parallel connection equal current control method, the real power controller and the idle power controller are adopted to control the UPS contravariant reference voltage, inductance current direct component is added into the UPS contravariant reference voltage, inductance current direct component of the other UPS in system can be obtained by CAN bus, after DSP calculation of every UPS, the average value of the parallel connection system inductance current direct component is calculated to as the system direct current component, then the given value of the direct current is compared with the direct current component of the UPS inductance current to obtain the difference of the inductance current, the difference passes PI adjustor to obtain the regulated quantity needed by the contravariant reference voltage, and the regulated quantity is used to control the UPS output voltage. So the effective control of the inductance current direct component can be realized, and the direct loop current of UPSs can be eliminated, the flow equalization property and stability of integral UPS parallel connection system can be improved.