The interaction between the upper and lower devices in a phase-leg configuration during switching is analyzed in detail, and a novel method to actively suppress crosstalk is proposed to fully utilize the potential of fast silicon carbide (SiC) devices. Moreover, this method is adopted in a driving circuit to suppress the crosstalk in SiC based phase-leg circuits. Through analysis of each operation mode of the proposed mitigation circuit, the design method of critical parameters is derived. Furthermore, to verify the validation of this method, a modular driving circuit is designed and testified in a 1 kW permanent magnet synchronous motor (PMSM) drive. Experimental results verify that the proposed method is feasible and reliable for crosstalk suppression in SiC based converters.