By analyzing the motion law of the planting device of eccentric disc and finger clip pattern transplanting machine 2ZY–1, a kind of VB program for the planting device is designed to analyze the plant trajectory. An ideal parameter range of planting device suitable for transplanting can be obtained by analyzing theoretical VB track produced from input and output data of parameters. Then, through the analysis of the experimental data, it was found that when the crane cup number is 4, the speed is 11.25 r/min, turning radius of the crane cup is 0.360 m and the λ equals to 1.125, the quality of planting could be improved and the agricultural needs could be met.