Control method for microwave oven and microwave oven

The invention discloses a control method for a microwave oven and the microwave oven. The control method for the microwave oven includes the steps that the microwave oven is started at first power to carry out microwave heating; in the heating process of the microwave oven, the work frequency and the work phase of the microwave oven are adjusted randomly or according to preset rules to obtain the adjusted work frequency and the adjusted work phase; according to the adjusted work frequency and the adjusted work phase, the return loss value of the microwave oven at the first power is calculated; whether the return loss value is larger than a preset loss threshold is judged, and when the return loss value is larger than the preset loss threshold, the work frequency and the work phase which correspond to the return loss value larger than the preset loss threshold are obtained, so that a target work frequency and a target work phase are obtained; and the work power of the microwave oven is adjusted to be second power, and the microwave oven is controlled to carry out microwave cooking at the target work frequency and the target work phase. By means of the control method and the microwave oven, microwave sources can be effectively protected, and the cooking effect of the microwave oven is improved.