Refrigerator defrosting control method and device and refrigerator

The invention discloses a refrigerator defrosting control method and device and a refrigerator. Within the duration of a one-time defrosting mode of the refrigerator, the control method comprises the steps that an electric heating assembly is started with first power, and the power of the electric heating assembly is gradually increased to second power within the first duration; keeping the electric heating assembly to operate for a second duration at a second power; the power of the electric heating assembly is controlled to be gradually reduced to 0 from the second power within the third duration; wherein the first power is smaller than the second power, the sum of the first duration, the second duration and the third duration does not exceed the duration of the defrosting mode, and the time intervals corresponding to the first duration, the second duration and the third duration are continuous. By means of the rising-keeping-falling power control mode, the situation that the defrosting temperature sensor is affected due to the fact that the temperature of the electric heating assembly rapidly rises when the defrosting period starts can be avoided, the situation that the high-temperature electric heating assembly conflicts with the refrigerating process of the evaporator when the defrosting period ends is also avoided, and the working reliability of the refrigerator is guaranteed.