In WSNs, the sensor nodes with the sensing, data processing, and communicating components are randomly deployed in the terrain of difficult access. They have to send the important sensing data to the sink by wireless links. However, their battery life time is limited. During the communication for the sensing data transmission, several kinds of attacks may occur. The node capture attacks are one prospective a kind of attacks. The key based several secure algorithms have been proposed for attack prevention. In case of the node capture attacks, when a node is captured in symmetric key based and asymmetric key based systems, attackers can get the key and the data. To resolve this problem, we propose a dynamic multi-path routing for important data protection and security from node capture attacks. We use the basic algorithm of baseline network structure in order to establish a dynamic multi-path for the secure transmission of sensing data. We compare the results of two metrics between dynamic multi-path and single-path methods by a relay node capture attack and prove the effectiveness of our approach through the simulation experiments.