Due　to　the　fact　that　the　cyber　security　risks　exist　in　industrial　control　system,　risk　assessment　on　Industrial　Automation　Platform　(IAP)　is　discussed　in　this　paper.　The　cyber　security　assessment　model　for　IAP　is　built　based　on　relevant　standards　at　abroad.　Fuzzy　analytic　hierarchy　process　and　fuzzy　comprehensive　evaluation　method　based　on　entropy　theory　are　utilized　to　evaluate　the　communication　links＇　risk　of　IAP　software.　As　a　result,　the　risk　weight　of　communication　links　which　have　impacts　on　platform　and　the　risk　level　of　this　platform　are　given　for　further　study　on　protective　strategy.　The　assessment　result　shows　that　the　methods　used　can　evaluate　this　platform　efficiently　and　practically.