A new threshold proxy signature scheme with known signers based on bilinear pairings theory is proposed using the technique of verifiable secret sharing.This new scheme not only solves the problem that QCX scheme has not the property of strong identifiablity through introducing the set ASI in the threshold proxy signature but also overcomes the security leaks such as collusion attack

the original forgeable attack in the congener schemes.The conclusion shows that this new scheme heightens computation efficiency about twenty percent and shortens the length of signature twenty-five percent compared with congener schemes.