Aiming at the problems such as difficult efficiency and low cleaning rate of small grain cleaning, manual operation of the existing grain cleaning device to achieve different sizes, different crops of different screening speed, complicated operation, not easy to adjust to the ideal speed and length, a grain air sieve cleaning device and air volume and wind speed monitoring system were designed. The parameters of the key components of the cleaning device were designed and calculated, and the threedimensional model of the cleaning machine was established. The air volume and wind speed monitoring system was designed to realize the remote monitoring of the air volume and wind speed of the air screen cleaning device, and the optimal effect of the wind speed of the fan could be achieved through the accurate adjustment of parameters. In order to obtain the best performance parameters of the cleaning device, with the cranking speed and fan speed as test factors, and grain impurity content and cleaning loss rate as evaluation indicators, a twofactor, fivelevel quadratic orthogonal rotational combination test was carried out to determine the best parameter combination. When the crank speed was 225 r/min and the fan speed was 915 r/min, the grain impurity content was just 2.42% and the cleaning loss rate was 2.77%. The verification experiment was carried out on the optimization results, and the verification results were basically consistent with the optimization results.
