Abstract: Study of centralized mining model and integrated technology match mode not only is the development trend of modern open pit coal mine，but also is one of the problems large open pit coal mine in China facing currently.By analysising exploitation of scale constraints comprehensively.With the objective of maximizing revenue to construct a single scale pit reasonable revenue function.By integer programming methods，established a multi-scale pit production model of the rational.And by analysising of Antaibao open pit，the results showed that the reasonable production scale of Antaibao was 22.0 Mt/a.

Key words: Surface coal mines, Production scale model, Factors