分析了包乘制、轮乘制、轮包结合制三种乘务制度的利与弊，指出究竟采用哪一种乘务制度，应视不同机务段的不同情况而定，不应千篇一律。 This paper analyzes the pros and cons of the three crew systems, including the system of package system, system of wheel system and combination of wheel package and package system. It is pointed out that which system should be used depends on the different circumstances of the different sections.