The invention discloses a variable frequency compressor, a frequency increment control method and a device thereof and an air conditioner. The method comprises the steps of: after starting the variable frequency compressor, adopting a mode of a frequency increment platform to perform the frequency increment control on the variable frequency compressor, obtaining the present operation frequency of the variable frequency compressor in real time, and judging if the present operation frequency of the variable frequency compressor is higher than and equal to the first preset frequency; if so, obtaining the exhaust overheating degree change rate of the variable frequency compressor operated on the present frequency increment platform; and prolonging the platform time of the present frequency increment platform if the exhaust overheating degree change rate of the variable frequency compressor operated on the present frequency increment platform is lower than the preset exhaust overheating degree change rate. When the method performs the frequency increment control on the variable frequency compressor, the platform time can be adjusted according to the present operation frequency of the variable frequency compressor and the exhaust overheating degree change rate of the variable frequency compressor operated on the present frequency increment platform, so that the frequency increment process of the variable frequency compressor is more stable and reliable.