By employing a classical hash function and random numbers, an arbitrated quantum signature with single particle was put forward. One merit of the presented protocol is that the secret keys of signer and receiver can be reused. Since the receiver does not perform a further verification after the arbitrator verifies the validity of a signature, the scheme can stand against the disavowal attack. And it transmits less quantum bits. The security of the protocol was discussed briefly. It was shown that this protocol can effectively defense the assault of initiative or passiveness.