Abstract: The efficiency of the handling operation line for general cargo is the basis of mechanical allocation, and the decisionmaking reference can be provided by the reasonable handling operation model. As to drop and pull transport mode of the carriage, general cargo handling characteristics are analyzed and a production site investigation is conducted. Considering the operation time and yard shift time of handling machines, a modeling method handling operation line with the carriage as operation unit is proposed, and an example is tested based on actual operation data. It is illustrated by the computational results that the relative errors between the model values and the actual values are less than 12%, and the absolute errors are no more than 20 tons per hour. The model is proved to be effective and provide the decision support for actual operation.