The invention provides a compensation starting method of an air conditioner. The air conditioner is provided with a control chip and a pressure switch which is connected with the control chip. The compensation starting method is characterized by comprising the following steps of: step S1, switching off the pressure switch to stop the running of the air conditioner; step S2, judging whether the pressure switch is damaged or not by the control chip; and step S3, starting the air conditioner again if the control chip judges that the pressure switch is damaged in the step S2. Through the compensation starting method of the air conditioner, disclosed by the embodiment of the invention, a situation that the air conditioner stops running since the pressure switch is damaged can be prevented so that the user satisfaction degree is improved and enough time is reserved for after-sale repair.