As an important technological component in the construction of intelligent open-pit mine, the wheel and bucket continuous process system is the core of its development. In this paper, the evaluation system of the actual capacity of the wheel bucket continuous process system is established by analyzing and studying the various influencing factors of the effectiveness of the wheel bucket continuous process system capacity. Using the CRITIC method to assign indicators to each factor; On this basis, a new comprehensive evaluation method of continuous process system based on TOPSIS of discrete approximate ideal solution was proposed. The effectiveness, objectivity and practicability of this method are tested through the practical application of ZhaHanur open-pit coal mine project. Continuous process capability is put forward in this paper the wheel bucket effectiveness evaluation model can objectively reflect the correlation between the evaluation index, is in determining index weight and round in the continuous process effectiveness evaluation on the beneficial exploration and its evaluation mechanism more in line with the actual, the evaluation results more intuitive and accurate, and to improve the wheel bucket has an important guiding significance to the continuous process effectiveness.