The all in one screw air compressor integrates the parts inluding screw compressor,freeze drier,fine filter and air tank. The all in one screw air compressor integrates a screw machine,an air storage tank,a freezing type drier and a precision filter,through the metal pipeline connection as a whole,the user site does not need to connect the secondary pipeline of the equipment,the installation is convenient,the use is simple,and the movement is flexible.