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During the mechanisms synthesis of epicyclic gear trains for transplanting by graph theory, it appears that the feasible functional schematic would be omitted easily when conversion from bicolored graph to functional schematic with experience. The approach that automatic generation of functional schematic of epicyclic gear trains (FSE) based on code value matrix (CVM) was proposed. Systematic conversion from topological graph to FSE was achieved. According to the structural features of the FSE, the basic graphic symbols of the epicyclic gear trains were defined and encoded. On the basis of using adjacency matrix to describe the motion constraints between links, fundamental circuits were extracted, the description of the CVM were completed and three types of functional schematic of fundamental circuits (FSF) were obtained. Based on the random combination of all fundamental circuits, the FSF were matched by the principle of fundamental circuits connection, and atlas of the FSE was established systematically. Finally, the automatic generation of FSE was carried out on the design of corn pot seedling transplanting mechanism with epicyclic gear trains. The structure design, prototype mechanism and trajectory testing of the transplanting mechanism were completed. The simulation trajectory and the test trajectory were compared, which were basically the same. The result verified the feasibility of the automatic generation of functional schematic.