Abstract: China's mining industry actively promotes the implementation of the going-out strategy, which provides a resource guarantee for the rapid development of China's economy and society.From 2002 to 2017, the changes of China's outward foreign direct investment(OFDI) in mining industry show that mining industry once occupied a dominant position in China's OFDI activities, but in the past two years, its proportion was negligible.And the OFDI of geological exploration industry grows gradually.China's mining industry overseas investment has obtained the certain result, but compared with the big international mining industry country also has certain disparity.In the future, China's economy will enter a stage of high-quality development, and the demand for mineral products is still huge.It is impossible to solve the problem of safe supply of mineral resources only through domestic supply.The global mining downturn provides a rare opportunity for China's mining overseas investment and acquisition.To continue to adhere to and increase the strength of mining to go out is the only choice to ensure the safe supply of China's mineral resources.