The collectors of automatic weather stations are damaged mostly by collector faults through wind sensors induced by lightning. The best way to solve this problem is to disconnect the physical connection (signal line and power line) of the wind sensor and collector, on condition that the data is surely collected. An opticalfiber wind signal isolator is design for automatic weather stations, which transits wind signals from the wind sensor to collector by means of EDA technology, and in which the wind sensor is powered by the lightning protection power. The tests show that this transmitter can not only protect the collector against lightning, but also guarantee data collecting, and has good promotion and application value.