Vibrating sieve for corn cleaning is a vital component of corn harvester. To further improve the screening efficiency of corn threshed mixture on the screen，a new type of driving mechanism of vibrating screen for corn cleaning was designed, in which three translations and two rotations of the screen can be realized based on the plane reciprocation mechanism with only two translation. To obtain the motion laws and screening performance of the screen，the displacement equation of any point on the screen were derived by using the closed vector polygon method. The lengths of each drive rod were determined by using optimal design of the software Isight. The optimization objective was that the displacement of the screen in the rear would be minimum. The back amplitudes of the screen optimized was 15.4mm. Combining Matlab software，the results of numerical simulation showed that the motion of the mechanism was cyclical and not simply harmonic. Comparative experiment was conducted on the new type of driving mechanism and the plane reciprocation mechanism. Sieving rate of corn particles penetrated the sieve with high-speed camera was recorded，under the condition of different speeds of spindle and the mass of corn threshed mixture. In the experiments，the mass percentages of corn kernels，corn stalks，corncob and light mixture were 73.3%，17.6%，8.7% and 0.4%, respectively. The conclusion was drawn that the optimized speed of spindle was 260r/min when the maximum feed mass was 6kg/s. The corresponding sieving rate was increased by 5.75% and energy consumption was reduced by 16.1%. The superiority of this new organization was proven. The research result provided a theoretical basis for designing more reasonable cleaning mechanism to improve the production efficiency.