To allow users to better understand JG/T 502-2016 “Epoxy Resin Coated Steel Reinforcing Bars”, standard main draftsman made revision and introduction from two aspects,that were the purpose,significance and the main contents of the revised. It mainly compared the similarities and differences between the pre and after the revision of the standard,and with the domestic and foreign existing standards.%为让使用者更好地理解 JG/T 502－2016《环氧树脂涂层钢筋》，标准主要起草人从标准修订的目的及意义、主要修订内容两个方面进行了说明。其中，重点对比了修订前后的该标准及与国内外现行标准关于技术指标的异同。
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