Most existing proxy resignature schemes are based on certificates or identity cryptosystems, and there are issues such as certificate management, key escrow security. In order to overcome the shortcomings such as strong security assumption and high computation cost in the existing proxy resignature schemes, a certificateless proxy re-signature scheme with aggregation property is proposed by combining proxy re-signature and certificateless public key cryptosystem. This scheme can aggregate an arbitrary-sized set of signatures or re-signatures into a set of signatures, and effectively reduce the communication overhead and computation cost of signature verification. The analysis results show that the proposal has a shorter signature length and resignature length. The proposed scheme is existentially unforgeable under the k-MCDH assumption.