The invention relates to a congestion control based non-connection-oriented reliable redundant network transmission method. According to the method, a network communication module is abstracted into three layers, including, a RUDP layer, a RMP layer and a UDP layer. The method comprises the steps that the RUDP layer is responsible for realizing reliable transmission of messages, increasing message headers of the RUDP layer, sending the message headers through a sliding window SWS, verifying received packets, replying a confirm sequence and realizing an overtime retransmission mechanism; the RMP layer is responsible for receiving messages transmitted by the RUDP layer, adding message headers of the RMP layer, realizing a management protocol of the RMP layer and filtering redundant messages while receiving the messages; the UDP layer, which is configured with a red network and a blue network, sends each packet of the RMP messages respectively through the red and blue networks and is responsible for transmitting the received messages to the RMP layer. Compared with the prior art, the congestion control based non-connection-oriented reliable redundant network transmission method has the advantages of being safe, redundant, efficient and the like.