Proxy multi-signature allows a proxy signer to generate signatures on behalf of a group of original signers.In a designated verifier signature scheme, the signature only can be verified by a designated person.In this paper, we give the model of ID-based designated verifier proxy multi-signature and present a new ID-based designated verifier proxy multisignature scheme.Its security is based on the computational Diffie-Hellman (CDH) problem and it is highly efficient.