Because the container wood floor installation is mainly finished depending on workers manual marking, drilling, locking, the questions come up such as low product quality and production efficiency. A special drilling machine which was used to solve the key problems in production was introduced. Its structure and positioning principle were introduced, PLC control system structure was given and PLC main program function block diagram was drawn. The practice has proved that the special machine not only reduces the labor intensity of operators, but also improves the production efficiency, the location of the drill is more accurate. Thus the quality of the container floor assembly is improved, and the production cost of container is reduced, at the same time the economic benefit of enterprise is improved.