The invention discloses a control method for preventing temperature-reaching halting of a variable-frequency air conditioner. The air conditioner comprises a control device, the triggering condition for a temperature-reaching halting preventing mode, the temperature-reaching halting preventing running frequency f, the temperature-reaching halting condition and the temperature-reaching halting preventing wind gear are preset in the control device, f meets the driving reliability, and pipeline stress vibration is qualified. The method comprises the steps that (1), whether the triggering condition for the temperature-reaching halting preventing mode is met or not is judged, if not, the current mode is kept, and if yes, the air conditioner enters in the temperature-reaching halting preventing mode; (2), the frequency is decreased to f, wherein the initial value of i is 1, i is smaller than or equal to n, n is larger than 1, and n is an element of a set N<+>; (3), whether the temperature-reaching halting condition is met or not is judged, if not, the current mode is kept, if yes, whether i is equal to n or not is judged, if not, the step (4) is conducted, and if yes, the step (5) is conducted; (4), the formula i=i+1 is conducted, and the step (2) is conducted; and (5), the rotation speed of an outer fan is decreased to the temperature-reaching halting preventing wind gear.According to the control method, the product comfortableness can be improved, the sudden cold and hot problem generated by temperature-reaching halting is avoided, and power consumption is reduced.