The invention discloses an anti-eavesdropping coding method based on fountain code coding. The method comprises the following steps: a sending end receives a random binary code sent and broadcasted by a receiving end; the sending end determines a matrix p1, the degree of which is 1; a matrix p2 is determined according to a transfer fountain code distribution function; a fountain coding matrix p is determined according to the matrix p1 and the matrix p2; the fountain coding matrix p is multiplied by k symbols of an information source to obtain fountain codes; and the random binary code and the fountain codes are subjected to exclusive-or operation to obtain coded information and the coded information is sent to the receiving end. According to the anti-eavesdropping coding method based on fountain code coding, the method is based on an information fountain code coding method and combines with noise signals; and when a receiver recovers information source information, it is hard for an eavesdropper to recover codes of all information due to randomness of a noise channel, so that error symbol rate in the speech receiving channel is high, eavesdropping fails and a purpose of safety communication is achieved.