A method for reducing the wireless relaying redundant forwarding on the basis of the iterated code, includes the steps: (1) the sign and the data signal are in the coded modulation by the source node, the power is allocated to the two signals according to the set emission power; (2)the sign and data signal are in superpose by the source node, the two signals after the superpose are broadcasted at the same velocity and the allocated power; (3) the relaying node judges whether the sign signal is received when the sign signal channel capacity from the source node to the relaying node is equal to the data signal channel capacity from the source node to the target node, if the sign signal is received, the received data signal can not be transmitted to the target node by the relaying node, otherwise, the received data signal is transmitted to the target node by the relaying node. In the invention, the relaying node can reduce the redundant forwarding in the minimal time delay, thus decreasing the influence to the time delay sensitive data as much as possible; when the relaying node has the data to transmit to the target node, the thruput from the node to the target node can be increased.