In this article,it was discussed that the relationship between locoweed toxis regular with the effect factors,such as global warming, aridity,overgrazing,low temperature in early spring,altitude,livestock breeds and age. And five technologies have been claimed,as theecological guardian',as feed during calamity period,as important herbs,as the host of cantharid,as grass store. There are five prevention and control technologies for locoweed toxis have been proposed that naturally and ecologically restoring,drug treatment,drug precaution, and grazing capacity control. And five control techniques for locoweed rampant just as follows: Biological control,alternating grazing, competitive sense,physical control,chemical control. All these technologies was referred to as3·5'green prevention and control technology system of locoweed.