The factors in connection with the selection of gear precision evaluation index are fully introduced in this paper,and the selection is analysed in detail,which provides the reliable theoretical basis for the correct seleetioa of gear precision evaluation index and assures the design accuracy of gear consequently.%详细介绍了齿轮精度评定指标选择应考虑的有关因素，并对其如何选择进行了深入全面的分析，为齿轮精度评定指标的正确选用提供了可靠的理论依据，从而最终确保齿轮的设计精度。
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