With a three-particle GHZ entangled state as the quantum channel, a quantum secret sharing scheme was proposed, which can realize the unknown three-particle quantum secret sharing, and the safety of the scheme was analyzed. It uses the measurements of GHZ state and X-basis on the particles, finally the three quantum states secret sharing is realized by using the corresponding unitary transformation. Compared with some related literature, the scheme completes the three-particle quantum secret sharing and not increases the difficulty of making quantum channel, for sharing more particles quantum secret sharing which provides the theory evidence.