The invention provides a physical layer security transmission method for keeping a relay and jamming node selection result secret. A wireless transmission network in which hacking nodes exist is established and comprises a source node S, a destination node D, M intermediate nodes T<1>, T<2>, ..., T<M>, and the K hacking nodes E<1>, E<2>, ..., E<K>, the whole transmission process includes two stages, wherein in the first stage, the source node broadcasts information s and considers that the information s can be successfully decoded in all the intermediate nodes in the stage; in the second stage, the selected intermediate nodes forward information to the destination node through a decoding forwarding protocol, and jamming nodes transmit jamming information to the hacking nodes. The security outage probability performance of the relay and jamming node selection result is similar to that of an optimal selection result acquired through a method of exhaustion, and the relay and jamming node selection result has high security outage probability performance; only statistical channel state information of a hacking user needs to be acquired in the relay and jamming node selection process, and high practicability is achieved; the relay and jamming node selection result is kept secret to the hacking nodes, and the transmission security of confidential signals is guaranteed.