The invention relates to a mobile ad hoc network based information efficient pushing and safe sharing system and method, and solves the problem that information sharing in existing mobile ad hoc networks is lack of security, effectiveness and access control. The a mobile ad hoc network based information efficient pushing and safe sharing system comprises a trustless third-party network service provider, a key generation center, an agent side, an information issuer and sharing users. The key generation center generates a decryption private key and a decryption public key of a user, sends the decryption private key and the decryption public key to the agent side, the information issuer and the sharing users through the network; the agent side pushes messages to users with access permission; the information issuer works out an access control strategy, and performing compression, snapshotting and encryption on the information; the sharing users decrypt and decompress the snapshots and the information to obtain original information. Based on an attribute encryption technology, the mobile ad hoc network based information efficient pushing and safe sharing system and method can perform compression, encryption and efficient pushing on shared information in the mobile ad hoc network, can guarantee high efficiency, security and confidentiality of information sharing in a mobile social network, and can realize efficient access control.