Abstract: Green walnut peeling is the first important tache for walnut postharvest processing. Centrifugal-mesh green walnut peeling machine had been introduced in this study,and the influence on peeling efficiency of physical characteristics of green walnut and structure of peeling machine had been analyzed. Based on this,walnut variety "Zha 343" were studied by single factor and orthogonal experiments. The results showed that mesh rotation speed had very significant effect on threshing rate(p<0.01),but the effect on the breakage rate was significant(p<0.05). Productivity and homework time had significant effect on threshing rate(p<0.05)and had no significant effect on the breakage rate(p>0.05). The best peeling effect appeared when the productivity was 900 kg/h,mesh rotation speed was 35 r/min,working time was 4 min,on the condition,threshing rate reached 91.02%,breakage rate was 5.27%. It would provide a reference for peeling peel mechanization.