Wireless sensor network is composed of sensor module, signal process m odule and radiation module. In order to ensure the smooth operation of wireless sensor network, the design of bioinspired self healing nodes based on redundancy is proposed, The field programmable analog array (FPAA) is embedded into the sensor module and signal process module is used to find abnormal circuit and drive FPAA to start redundancy circuit for the reconfiguration of sensor module. Firstly，the general design of self healing sensor nodes is introduced. Then，taking strain wireless sensor network nodes as a specific application object,dynamically reconfigurable self-healing wireless sensor nodes are realized in se n sor module. Finally, the self-healing function is verified by the reconfigurable experiment of abnormal saturation of signal.