The invention discloses a Modbus communication concentrator, which comprises a shell, a communication interface formed on the shell and a central control unit, an isolation power module, a data storage unit, a 485 communication unit, a controller area network (CAN) communication unit and an Ethernet communication unit which are arranged in the shell, wherein the communication interface comprises a 485 interface, a CAN interface and an Ethernet interface. The Modbus communication concentrator is used as a master machine, can be connected with a large number of sets of equipment supporting an RS485 modbus slave machine protocol and can acquire data of the slave machine equipment after being simply configured with an address table of the slave machine; the Modbus communication concentrator is used as a slave machine and provided with rich interfaces, such as the 485 interface, the CAN interface and the Ethernet interface, can transmit data through a CAN or the Ethernet and is high in transmission speed and high in reliability; and furthermore, networking can be realized, so that the data can be transmitted to the master machine end. The Modbus communication concentrator has the characteristics of high integration degree, high reliability, flexibility in configuration and low maintenance cost and facilitates centralized management on a large number of sets of terminal equipment.