Abstract: In china, vegetable grafting was done mostly by manual work. To solve the problems such as low efficiency, low survival rate and low quality, according to the splice grafting process of gourd and solanaceous seedlings, with double feeding location of seedlings, transporting device, cutting device, seedling-fixing device and clip-delivering device were determined and a prototype model of vegetable grafting robot was constructed based on simulation design in this article. Mechanism analysis and experiment showed that when the cutting knife rotation radius was 68mm and the cutting speed was 120 r/min, the success rate of seedling cutting was 98% which could meet the need of grafting technique. The grafting rate reached 884 plants per hour, grafting success rate was 95.7% and survival ratio was 96.8%. Therefore, grafting robot can resolve existing problem of artificial grafting take place of manual work.