For a phase-leg circuit, the gate drive signal of one device may be affected by the switching transition of the complementary devices, leading to the phenomenon of crosstalk. SiC MOSFET is widely used in aviation electrical equipment due to their excellent switching characteristics, but the ability of high switching speed also makes it more sensitive to crosstalk. In traditional circuit analysis, the effects of parasitic inductance are often neglected. This paper analyzes the crosstalk mechanism when considering parasitic inductance and experimentally verifies the impact of different parasitic inductances on the magnitude of crosstalk voltage. Double pulse tests are conducted to validate the suppression effect of the optimized drive circuit on crosstalk of the phase-leg configuration. The influence of different inductance parameters on crosstalk suppression effectiveness is analyzed, and the parameters of the active clamp auxiliary circuit are optimized.