Network congestion control method and device of data center and storage medium

The invention discloses a network congestion control method and device of a data center and a storage medium. The method comprises the following steps: receiving a first data packet sent by a receiving end of at least one switch in a data center, analyzing the first data packet to obtain a data storage interval of the at least one switch, the data storage interval comprising an upper limit storage value and a lower limit storage value, the upper limit storage value is used for representing the maximum storage value of at least one switch, and the lower limit storage value is used for representing the minimum storage value of at least one switch; determining actual delay information of the at least one switch based on the data storage interval; determining a data sending rate based on the actual delay information and preset delay information of the at least one switch; and controlling the byte output quantity of at least one switch based on the data transmission rate so as to reduce the network congestion of t