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Based on nonlinear time-delay mean value idling mode of GDI engine, aiming at torque interfere generated by auto accessories using of electricity under idling mode, the delay-dependent H∞ state feedback controller was designed. It did not only guarantee the closed-loop control system asymptotic stability, but also met suppression ability as γ about the output to disturbance input. The delay included induction-to-torque delay under steady state of engine, delay between time of air input controlled by air throttle to actual time of this section into the cylinder under transient state of engine, also included delay of the action of the air throttle. The time-delay which was discussed was all uncertain time-invariant, but each had a constant upper bound. Finally, the modeling correctness and validity of control method was verified by using the exact engine model established by en-DYNA software. Compared with control effects of controller without considering delay and delay-independent controller which was designed with considering the time-delay problem，the integrated control effects of delay-dependent controller designed by this research is the best .