Control method and device for semiconductor microwave oven and semiconductor microwave oven

The invention discloses a control method and device for a semiconductor microwave oven and the semiconductor microwave oven. The control method of the semiconductor microwave oven comprises the following steps that the output power and the cooking time of the semiconductor microwave oven are obtained; according to the output power of the semiconductor microwave oven, the power of a corresponding signal source of the semiconductor microwave oven is calculated; the frequency and phase of the signal source corresponding to the minimum standing-wave ratio of the semiconductor microwave oven are obtained through an optimum efficiency algorithm every preset time interval; and in each preset time interval, heating control is conducted on the semiconductor microwave oven according to the power of the signal source and the obtained frequency and phase of the signal source corresponding to the minimum standing-wave ratio until the cooking time is up. According to the control method for the semiconductor microwave oven, the response speed and the stability of power adjustment of the semiconductor microwave oven can be improved, and the heating efficiency of the semiconductor microwave oven can be further improved.