With the vigorous development of technologies such as 5G，Big Data，Cloud Computing，Internet of Things and Artificial Intelligence，more and more multi-robot application scenarios appear in human production and life. Aims at the problem of channel collision and communication failure caused by inconsistent communication protocols in multi-robot cooperative communication. An improved exponential increasing exponential decreasing back off algorithm(IEIED)and cloud platform information exchange based on 5G communication are proposed. These technologies can effectively reduce the channel collision probability of multi-robot communication，improve the fairness of channel access and improved network throughput rate，reduce the delay of data transmission；Using the cloud platform information exchange technology，centralizing data processing，data sharing， data fusion，etc. on the cloud，can greatly simplify the design of user terminals. You only need to use the communication module to connect robots to the cloud platform，various robots can be interconnected.