The utility model discloses a needle connects formula tomato grafting device, including motor, control panel, electric cabinet, first support, incubator, second support, conveyer belt, pressure head,withdraw the needle mouth, first fixed plate, gasket, grafting needle, maternal plant, tomato seedling, culture solution and second fixed plate. The beneficial effects of the utility model are that: when setting up the fixed plate and can prevent that the pressure head from going into the grafting stylus printer in the plant through the one side at the pressure head, owing to there is not the thing to support, make the plant take place to buckle or break, can prevent through add the culture solution in the incubator that the plant from at the grafting in -process, owing to lack nutrition and result in witheredly or dead, can save the cost of labor through carrying out the continuous production on the production line, put forward the high automation level, so improvement work efficiency, reduction in production cost. The device adopts the theory of operation of similar stapler, go into the plant with the grafting stylus printer in, and then improved the success rate that the grafting iscarried out to method that the tomato adopted the needle to connect the formula, can improve production efficiency.