Wireless networks are getting popular due to their ease of use MANET is a wireless ad hoc network, decentralized network and autonomous system. Each node in MANET is free to moving in and out direction in network. Recently in past few years Security of computer network has been of serious concern. Due to various factors including lack of infrasture, absence already established trust relationship in between the different nodes. The routing protocols are vulnerable to various attacks Denial–of-service (DOS) attacks are namely as black hole, gray hole, worm hole attack. Reactive routing protocols are suitable for this kind of attack. The proposed algorithm used the trust value which is used to identify the malicious node, after identifying the malicious node it will be removed from the neighboring table and we select the another path. This proposed algorithm can offer a secure way transmission between any nodes in network topology. We propose modification to the AODV protocol and justify the solution with implementation and simulation using NS-2.33. Our analysis shows the significant improvement in end-to-end delay, throughput, and packet delivery ratio of AODV in presence of Black hole attack.