The invention discloses an intelligent sewage treatment aeration device. The device is characterized in that a frequency conversion speed regulation circuit is used for adjusting the power supply frequency of a motor to realize the adjustment of the operating rotation speed of the motor; a rotation speed detection circuit is used for detecting the output rotation speed of the motor; a temperature,wind pressure and flow detection circuit is respectively used for realizing the temperature, wind pressure and flow detection of the output gas of a centrifugal fan; an aeration device is installed at the bottom of an aerobic tank for realizing the aeration function of the aerobic tank and improving the oxygen content in the water of the aerobic tank; a BOD detection circuit is used for detectingthe biological oxygen demand of the aerobic tank; a DO detection circuit is used for detecting the oxygen content in the water of the water outlet of the aerobic tank. According to the intelligent sewage treatment aeration device disclosed by the invention, in combination with a sewage treatment process, the working frequency of the motor is controlled according to the DO value of the water outlet of the aerobic tank; in combination with feedback data such as BOD value, air outlet temperature, wind pressure and flow, the working state of a system is judged; the device has the advantages of energy saving, high efficiency, stability and the like.