Abstract: The group signature scheme allows its registered group members to share a group signature key, which can generate multiple anonymous group signatures. Traditional group signature schemes cannot effectively support dynamic authentication, and they are also insecure against quantum attacks. To address the above issues, a new lattice- based deniable fully dynamic group signature scheme is proposed. The new scheme allowed any group user to dynamically join the group and achieve effective revocation, without affecting the validity of the generated signature. The scheme was about dynamic group signatures on lattices, which could effectively resist quantum attacks. In addition, the scheme adopted the repudiation proposed by Ishida et al. Considering the situation where a group of members were accused of signing on a given signature, deniability preserved the anonymity of the signer and discloses evidence that the signer was not a suspect.