The utility model relates to a diagonal member device for case equipment transportation, which comprises a diagonal member, a coupling assembly connected with the diagonal member, and a coupling bolt assembly used to connect the coupling assembly with offered case equipment, wherein the coupling assembly comprises a connection board cooperatively connected with the offered case equipment, and the connection board is equipped with a connecting hole which is used for the connecting of the coupling bolt assembly. After the diagonal member device is cooperatively connected with the offered case equipment, the top surface or top surface handle hole and the bottom surface or bottom surface handle hole of the diagonal member can meet the diagonal member stacking, firm fastening and cooperation requirements of standard containers. The utility model realizes that the operational transportation equipment of a container transportation system is utilized to transport large-scale special type case equipment, which greatly enhances transportation and is favorable for large-scale special type case equipment manufacturers to decrease transportation cost and enhance the market competition of large-scale special type case equipment. The diagonal member device for case equipment transportation is simple in structure and low in manufacturing cost, does not destroy offered case equipment structure, and can be repeatedly used for transportation of same products.