Reverse circulation (RC) sample drilling is another technical revolution in drilling technology, which has been widely applied in western counties for its efficiency, low cost and high adaptability. In recent years, RC drilling has also been paid more and more attention in China with more and more application. Sampling technology is an important part of RC drilling, comparing with some foreign countries, the sampling technology is still backward in China. The double-outlet cyclone sampler is an improved device on the basis of a single outlet cyclone sampler; the valve is shared by 2 outlets, one opening while another closing. Samples taking are in turn at 2 outlets by the valve switching to avoid samples missing in continuous drilling and reduce the dust pollution in the sampling process. Through the application in RC drilling test in Kalatage equipped exploration mining area, it is proved that this double-outlet cyclone sampler has great superiority in preventing samples omission, reducing environmental pollution and facilitating sampling operation.