The invention discloses a quantum secret sharing method based on a round-robin differential phase-shifting quantum key distribution protocol. The method comprises a secret distributor Alice and at least two participants Bob and Charlie; the distributor Alice divides one piece of information into two parts to respectively send to the Bob and the Charlie following the cyclic differential phase-shifting quantum key distribution protocol; and the information of the Alice can be acquired as long as the Bob and the Charlie mutually cooperate in honest. The single-photon light source is used in the method disclosed by the invention, the RRDPS-QKD protocol is applied to the quantum secret sharing, and higher noise tolerance and operation convenience are provided.