Bus system in miniature plant factory

The invention relates to the field of plant factories and particularly discloses a bus system in a miniature plant factory. The bus system disclosed by the invention comprises multiple distributed function nodes, a bus connecting plate, a bus physical interface, a bus power supply and a bus master controller, wherein the multiple distributed function nodes are arranged in the miniature plant factory; a bus is arranged on the bus connecting plate; the multiple distributed function nodes are connected with the bus; the bus physical interface is connected with the multiple distributed function nodes and the bus on the bus connecting plate; the bus power supply is connected with a plurality of lines in the bus and used for providing power for the bus system; and the bus master controller is connected with the residual several lines in the bus and used for triggering and controlling the communication among the multiple distributed function nodes. The bus system disclosed by the invention is suitable for being used in the miniature plant factory and has the advantages of low cost and convenience in installation.