Abstract: The cutter suction dredger is a kind of construction equipment which is widely used in dredging construction in the field of hydraulic engineering. The states of dredging operations can be measured by a work condition monitoring system embedded into the dredger in real time. However, the obtained data cannot provide enough key information directly for the dredging operation smoothness. This paper presents a method to analyze and evaluate the dredging operation smoothness based on the construction cycles. At first, the appropriate monitoring parameters are selected as the index of the dredging operation smoothness. And then the dredging operation smoothness is analyzed in the predefined construction cycles, and the dredging operation smoothness values are obtained for both the whole dredging construction process and each construction cycle. According to the obtained results, the dredging operation smoothness of the operators and the corresponding dredging production can be evaluated intuitively, which provides an effective guidance for dredging operations. Meanwhile, compared with the traditional method for analyzing the smoothness of the dredging operations, the proposed method can reflect the changes in the smoothness values quantitatively for both the whole construction process and each construction cycle. In addition, the method given by this paper can make up for the shortcomings of the traditional method and has stronger practicability and superiority.