With proxy signature,an original signer can delegate his signing authority to a proxy signer who signs a message on behalf of the original signer.In blind signature scheme,a signing messages are unknown to the signer,which makes the blind signature and the identity of the requester cannot be traced.Based on bilinear projection of Weil Pairing,an efficient ID-based proxy blind signature scheme is presented by combining proxy signature with blind signature scheme.The analysis shows that the proposed scheme can satisfy all the required properties of a proxy blind signature.Furthermore,its efficiency is also better than that of the exiting schemes.