The invention provides a parallel connection IGBT dynamic flow equalizing method and a device thereof, wherein the method comprises the following steps: first, the conducting time difference and the switch-off time difference of IGBT branches of the parallel connection IGBT are fixed; second, a plurality of branches of PWM waves used for driving the parallel connection IGBT are generated according to the conducting time difference and the switch-off time difference, and the branches of PWM waves enable each branch of the output waves of the driven parallel connection IGBT to be synchronous. The device comprises a current collecting module and a current control module. By using the method of adjusting the IGBT driving waves and being compared with the method of adjusting the resistance parameter in the prior art, the parallel connection IGBT dynamic flow equalizing method and the device thereof have the advantages of simple structure, low cost, high reliability, good flow equalizing effect, and the like.