Cyclone dust collector is a kind of dust removal device. The mechanism of dust removal is to make the dusty airflow rotate, and with the help of centrifugal force, the dust particles will be separated from the airflow and captured in the wall of the device, and then with the help of gravity, the dust particles will fall into the dust hopper. Each component of the cyclone dust collector has a certain size ratio, and the change of each ratio relationship can affect the efficiency and pressure loss of the cyclone dust collector, of which the diameter of the dust collector, the size of the air inlet and the diameter of the exhaust pipe are the main influencing factors. In the use of attention should be paid to, when exceeding a certain limit, favorable factors can also be transformed into unfavorable factors. In addition, some factors are favorable for improving the dust removal efficiency, but will increase the pressure loss, so the adjustment of the factors must be balanced.