Wireless Sensor Network (WSN) is one kind of wireless network system which comprised with a sink node and a number of sensor nodes. The main purpose of WSN is to monitor and to track every single movement in a specific area. Sensor nodes are deployed density in the network and transmit the gathered information to sink node in a multi-hop manner. Therefore, some sensor nodes tend to exhaust their energy more easily than other nodes due to their heavy traffic load on packet forwarding. In wireless sensor network environment, network partition is a frequent phenomenon which could make the seasoning data much less preciously. Therefore, WSN need a partition detection mechanism to mark the “Undetected Area” and bypass this area when forwarding message to sink node. This paper proposes an efficient Partition Detection and Avoidance Protocol to detect the network undetected area, to avoid network partition phenomenon and to extend the sensor network life time. According the experiments of this paper, simulation results shows that the developed partition detection and avoidance protocols can efficiently detect and monitor the obstacle to prevent network partition and keep network always connected, Moreover, It could indeed extend the sensor network lifetime.