The invention relates to a method for controlling an automobile air conditioner displacement-fixed compressor. The temperature outside an automobile serves as the condition for starting the compressor, the method specifically includes the following steps of presetting a threshold value A of the temperature outside the automobile, detecting the value of the temperature outside the automobile, judging whether the value of the temperature outside the automobile is larger than the preset threshold value A of the temperature outside the automobile, if yes, starting the compressor, and if not, stopping the compressor. According to the method, the phenomenon that energy waste is caused due to the fact that the displacement-fixed compressor is in the started state when the temperature outside the automobile is low is avoided; the phenomenon that the lubricating effect is not good due to the fact that viscosity of lubricating oil in a lubricating system of the compressor is high when the temperature outside the automobile is low is avoided; by setting the conditions, the service life of the compressor can be prolonged, and performance of an air conditioner system is improved.