Abstract: By analyzing the characteristics of industrial wireless network topology, a multi-path routing algorithm for the wireless networks for industrial automation-process automation (WIA-PA) is proposed in this paper. Comparing multi-path with single node forwarding data, and transmitted path selection according to power consumption, forwarding the data with traditional method will more likely to cause excessive energy consumption and reduce the lifetime of the network. In order to increase the network availability, a multi-path algorithm with energy consideration is used. Finally, based on the simulations on OMNET++ simulation platform, simulation experiments show that the protocol designed in this paper ensures a better availability in industrial wireless networks.