Abstract: The data center network is strongly attracted by the lossless network. In order to achieve the goal of lossless, many new congestion control protocols have been proposed, such as DCTCP, QCN, DCQCN, etc. This paper conducted simulation experiments on DCTCP, DCQCN, and other congestion control algorithms. The situations that different congestion controls deal with a large number of bursts in the data center network model were analyzed in the paper. It was also analyzed in this paper that the problems like congestion diffusion, transmission source blocking, and deadlock were exposed when dealing with burst flows. To solve these problems, fusion control congestion notification (hereinafter referred to as FCCN) was proposed, aimed at improving congestion diffusion and deadlock and reducing the throughput loss of congestion control. Multiple simulation results show that the proposed FCCN method can deal with 1.5 times of the burst flow of DCTCP without packet loss, and the reduction of the burst flow to the whole network throughput is reduced by 20%, and the delay is reduced by 25%.