In order to solve the problem that machine PLC is not to be able to communicate directly with MCIS when an enterprise implement MCIS project， using small programmable logic controller which support control and communication link as a bridge to realize the communication was put forward.How to use the machine remote extended I/O board and Omron CP1L type PLC to complete CCLink field bus interface design of CNC machine was explained. The communication between machine PLC and MCIS was realized by control circuit and PLC program.MCIS remote operation machine and read status information of machine tool was realized by this information interface technology which meets the MCIS program requirements by test in customer field. It provides an effective way for MCIS project implementation and manufacturing industry information and networking.