Abstract: In order to study the top coal caving rate in big dip angle long wall full-mechanized caving faces along strike under different caving order conditions, this paper analyzed the influence of working face's dip angle and caving order on top coal's movement and caving. With PFC^2D software, this paper simulated the big dip angle long wall full-mechanized caving face along strike in coal mine of the Fourth Agricultural Division 71 Regiment of Xinjiang Production and Construction Corps and counted the top coal caving rate of the working faces under the different dip angle and different caving order conditions. The results showed that when we used upward caving order, the top coal caving rate increased with the increase of working face's dip angle, while this trend was the opposite when we used downward caving order. With the increase of working face's dip angle, the advantage of top coal caving rate under upward caving order became more obvious. In the application of actual mining, using the upward caving order obtained good top coal recovery effect.