e+e−→t1̃t1̃∗

We consider the effects of the CP-violating phases, e.g. arg(At) and arg(μ) on the e+e−→t1̃t1̃∗(H1) processes. The third generation squark trilinear terms give significant contributions to the Higgs potential at the one-loop level. This results in the changes of the stop masses, the Higgs mass and the lighter stop-the lighter stop∗-the lightest Higgs coupling. We show the coupling and the loop effects on the processes. And we will discuss the determination method of soft parameters.