Method for authentic data transmission using UDP protocol

The invention discloses a method for transmitting reliable data by using a UDP protocol, which can avoid the phenomenon of loss of a datagram, unordered arrival of a data packet, and the like, and can achieve congestion control, so as to achieve reliable data transmission in Internet by using the UDP protocol, and enhance convenience and success rate of data transmission in Internet application such as P2P and the like. The method mainly comprises: a step of carrying out connection handshake between a sender and a receiver; a step of storing data sent by the sender into a sending queue during data transmission and then deleting the sent data from the sending queue after receiving response of the receiver; a step of putting effective data into a receiving buffer according to a serial number of a data packet during data transmission after the receiver receives the data packet sent by the sender; and a step of negotiating closing connection between the sender and the receiver of the data.