With the expansion of wireless sensor networks, the issue of localizing individual nodes has become increasingly important for a variety of different applications. Over the past few years, there have been several solutions proposed for node localization in wireless sensor networks (WSNs), either relying on the range information provided by Range-Free or the range measurements using Range-Based techniques. Among all these methods, multi-clustering localization (MCL) is one of the most popular ones. MCL enables efficient, scalable and cost effective localization of nodes in networks in which there are multiple clusters of nodes. The basic principle of MCL is exchanging messages between clusters to estimate the location of nodes in one network. During a MCL process, a cluster head uses range information such as Received Signal Strength (RSS), Time of Arrival (TOA), or Time Difference of Arrival (TDoA) measurements of signals transmitted by another cluster to calculate approximated location of a node. In this paper, a secure Node Localization and Effective Routing (NLER) have proposed for multi-clusters in Wireless Sensor Networks. The Multi-Clustering Localization plays an important role in wireless sensor networks for precise global localization of nodes. This localization process is based on exchanging different messages such as RRS, TOA or TDOA to identify the position of individual nodes. Moreover, by using different optimization techniques such as evolutionary algorithms and cluster positioning algorithms, MCL accuracy, energy consumption and communication overhead can be significantly improved.