Mass data transmission method based on UDP (User Datagram Protocol)

The invention discloses a mass data transmission method based on a UDP (User Datagram Protocol). A data sending end adopts a variable-size sliding window for flow control, the size of the sliding window is the size of the longest transmission message preset by two transmission parties, the longest transmission message is used as the largest transmission unit, and the sending of a data packet is controlled at the data sending end according a loss link list established by a control packet; a data receiving end receives the data packet and the control packet and processes the response and retransmission mechanisms according to the protocol type of the control packet; if the sequence number of the packet received by the receiving party is SEQ=x, the receiving party responds ACK=x+1; and if the receiving party receives NAK (Negative Acknowledgement) packets, the sequence numbers carried in all the NAK packets are put in the loss link list of a sending party which is responsible for retransmission.