The invention relates to a congestion avoidance method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining distances among all nodes in a communication link for transmitting a data packet, so as to obtain a distance value; calculating the sum of the distance values to obtain a channel length; calculating the time delay of the current node to obtain atarget time delay; judging whether the packet processing time delay in the target time delay is the minimum packet processing time delay or not; if yes, calculating a minimum round-trip time value according to the target time delay; calculating a comparison parameter according to the minimum round-trip time value and the target time delay to obtain a target comparison parameter; calculating a congestion window of the current round according to the comparison parameter and a set value to obtain an actual congestion window value; judging whether the data packet completes transmission or not according to the actual congestion window value; if yes, entering an end step; and if not, returning to the first step. Congestion and packet loss are avoided as much as possible, the system resource utilization rate is improved as possible, and the method is suitable for a satellite communication network.