Modular universal controller structure

The utility model discloses a modularization universal controller structure, including controller main part and a plurality of extensible interface module, the controller main part includes box body, communication connection board and controller main part, the communication connection board is connected with the controller main part, the communication connection board and the controller main part are arranged in the box body, the extensible interface module is connected with the communication connection board, and the extensible interface module is connected with the controller main part. The side portion of the box body is provided with at least two installation ports used for installing the extensible interface modules, the extensible interface modules are arranged in one-to-one correspondence with the installation ports, each extensible interface module comprises a module PCB, a relay, a wiring terminal and a connector, the relays, the wiring terminals and the connectors are arranged on the module PCBs, an