The invention discloses a two-stage quantum state cooperative multicast method based on a butterfly network structure, which belongs to the field of multi-party quantum secret communication. The two-stage quantum state cooperative multicast method comprises the following steps: two source nodes in a sender are measured by using particles with entangled states to obtain a measurement result and anentangled state particle collapse state; the intermediate node C1 corrects the coefficient subscripts of the collapsed state of the entangled state particles by using the measurement result to obtaina corrected state; the source node sends the correction state to a target node through a side channel; the intermediate node C1 sends the measurement result to an intermediate node C2 through a bottleneck channel, and the intermediate node C2 generates a classic bit by using the measurement result and sends the classic bit to a target node; the target node performs unitary operation on a correction state by using the classic bit, so that the target node has the same quantum state, and cooperative multicast of two stages of quantum states is completed; the two target nodes in the butterfly network can obtain the same quantum state with a determined probability.