Aiming at the problems of incomplete separation of residual film and soil, increased impurity rate, and reduced residual film recovery rate due to the paste sieve in the process of separating residual film and soil in the tillage residual film recycling machine, a vibrating sieve and chain brush combined separating and recycling device is proposed, which carries out the sieving and cleaning operation of residual film and soil by driving the vibrating sieve to swing and the chain brush to rotate through the eccentric shaft. Based on the kinematic analysis, the effect of the combined motion of the vibrating chain brush on the separation of residual film and soil was carried out, and the law of the separation of residual film and soil was analyzed; The maximum amplitude, vibration frequency and chain brush revolutions of the vibrating screen of the tillage residual film recycling machine are used as test factors, and the recovery rate and impurity rate of the screening device are used as evaluation indexes. The Box-Behnken test showed that the best combination of parameters was 10.88mm maximum amplitude、 8.97Hz frequency and 1.66r/s chain brush revolution, under the best combination of parameters, the predicted values of recovery rate and impurity rate were 91.12% and 91.12% respectively. The predicted values were 91.12% and 0.19%, respectively. Field tests showed that the combination of vibrating screen and chain brush operated smoothly in the field, and the recovery and winding rates were 89.65% and 0.32%, respectively. This study can provide a reference for the optimization and improvement of the structure of the sieving device of the tillage layer residual film recycling machine.