Abstract: Taking the N0.2 mining area of Kunyang phosphate mine of Yunnan Phosphate Chemical Group Co.，Ltd (YPC) as engineering background，the transport process of large slope skip in the open pit phosphorus mine was studied by various research methods such as theoretical analysis，field measurement and feasibility demonstration of technical and economic scheme，according to the field research of the specific geological and mining conditions.The results showed that:①Comparing with the traditional single bucket truck transport process，the large slope skip the transport process has the following advantages，including lower cost，less air pollution and noise pollution and lower maintenance cost.And it has a large advantage in deep concave mining stage that the stope mining vertical depth is greater than or equal to 85 m.②The large slope skip the transport process also has the following inferiors，such as larger initial investment，relatively fixed system and more complicated procedure etc..And it has a large application limitation in shallow mining stage that the stope mining vertical depth is less than 85 m.The relevant research results can provide theoretical and technical guidance and advice for the open pit transportation technology of this mining area or mining area with similar conditions.

Key words: Open pit phosphorus mine, Transport process of large slope skip, Theoretical analysis, Actual measurement, Feasibility demonstration of scheme, Technical and economic demonstration