The vegetable production in China is dominated by plastic greenhouses and small and medium-sized arch greenhouses. Due to the size limitations of shoulder height and ridge height, and poor ventilation, the common field transplanting machine are difficult to meet the transplanting requirements. According to the requirements of vegetable transplanting in greenhouse, a small wireless remote-controlled fully-automatic transplanting machine was designed, which can be used for quick transplanting of greenhouse seedlings, driven by pure electric power, pollution-free and compact. It mainly includes the seedlings tray carrier unit, seedling extraction unit, seedling separation unit, the machine chassis, and the control system. The transplanting qualified rate of transplanting machine under different transplanting frequency was determined by the simulated planting experiment. The results show that the qualified rate decreased with the increase of planting frequency. When the planting frequency was 60 plants/min/row, the qualified rate was 94.4%. It shows that the main parts of the transplanting machine designed in this paper coordinated in motion and stable operation, which meets the transplanting requirements of seedlings in dry land.