Wireless sensor networks tranquil from a large number of sensor nodes with the ability to sense and process data in the physical world in a timely manner. The sensor nodes contain a battery constraint which limit the network lifetime. Due to energy constraints, the deployment of WSNs (Wireless Sensor Networks) will required advance techniques to maintain the network lifetime. A clustering based routing algorithm called Low-Energy Adaptive Clustering Hierarchy (LEACH) has been reviewed as a solution for low power consumption. The implementation of LEACH algorithm could be done simulator to analyze the performance of this algorithm in term of network lifetime. LEACH algorithm shows some drawbacks that need improvements to overcome it as to improve the performance.