The invention discloses an encrypted blind signature method based on an obfuscation technology. The method comprises the specific realization steps of 1, generating cipher system public parameters; 2, generating a signature key pair and an encryption key pair; 3, obfuscating signature keys; 4, generating a ciphertext; 5, re-randomizing the ciphertext; 6, decrypting an encrypted blind signature; 7, judging whether the blind signature satisfies a blind signature matching condition or not; 8, confirming that the blind signature is valid by a user; and 9, logging out a cipher system. According to the method, the obfuscation technology is adopted, a signer obfuscates the keys, so the signature keys of the signer are effectively protected, and the security of the encrypted blind signature is improved. According to the method, the ciphertext is re-randomized by a receiver, so the data volume processed by the receiver is greatly reduced. According to the method, the blind signature matching condition is simple, so the performance efficiency of judging the validity of the blind signature is greatly improved.