The invention discloses a detection control method for accelerator mistakenly stepping of a passenger vehicle. The detection control method comprises the following steps that S1, a vehicle state signal is acquired; S2, whether the vehicle is in a static or low-speed state or not is judged, if yes, step 3 is executed, and otherwise, step 8 is executed; S3, whether the release time of a brake pedalis less than a time threshold value or not is judged, if yes, step 4 is executed, and otherwise, step 8 is executed; S4, whether the accelerator pedal change rate exceeds an accelerator pedal change rate threshold value and whether the depth of the accelerator pedal is larger than an accelerator pedal depth threshold value or not are judged, and if yes, step 5 is executed, and otherwise, step 8 isexecuted; S5, the accelerator is mistakenly stepped, and an accelerator pedal mistakenly stepping control preventing mode is entered; S6, whether the accelerator pedal is released and the brake pedalis stepped down or not is judged, if yes, step 5 is returned and executed, and otherwise, step 8 is executed; S7, the accelerator pedal mistakenly stepping control preventing mode is stopped; and S8,the passenger vehicle normally runs. According to the detection control method, the accelerator mistakenly stepping behavior can be accurately detected under a low-speed entering and exiting drivingscene, and the response of a power system is properly controlled.