Abstract: With the increasing of production scale，semi-continuous system is widely used in surface coal mine.The practice proved that application of the semi-continuous system has greatly improved economic efficiency in opencast mines.Among this，location of crushing station plays a decisive role in improving production efficiency.With the aid of the definition of limiting slope and capacity requirements of crushing station in pit，the coal seam partition was made.On this basis，the calculation method for the transport distance of coal truck to underground crushing station and surface crushing station，increased transport distance of internal dumping and the elevating belt length in pit was present.After considering the semi-continuous system as a whole，and by the principle of totally minimum transport cost，the optimization model of crushing station layout was established to propose calculation methods for total transport freight of the truck，the increasingly internal dumping and the hoist system.Meanwhile，the model was applied into the practical engineering.The calculation results showed that the total transport cost is minimum when crushing station is arranged on +625 m level in Baorixile Open Pit Mine，and this is the optimal position for crushing station.In addition，the analysis indicated that location of crushing station in pit can not be too low to avoid from a worse impact on internal dumping.

Key words: Surface mine, Semi-continuous system, Semi-stationary crushing station, Seam partition, Location optimization