This　article　establishes　a　set　of　index　system　to　evaluate　the　effect　of　technological　innovation　diffusion　in　industrial　agglomeration.　It　takes　the　electronic　information　industry　as　evaluation　object,　and　does　some　empirical　research　about　Guangdong,　Fujian,　Jiangsu,　Zhejiang,　the　eastern　region＇s　average　level　and　the　national　average　level　in　order　to　profoundly　analyze　some　core　issue　in　typical　regional　industrial　agglomeration,　such　as　diffusing　capacity　of　technological　innovation　subject,　the　innovation　diffusing　speed,　the　innovation　diffusing　extent,　the　innovation　diffusing　performance,　the　innovation　diffusing　environment　and　so　on.　On　the　basis,　the　technological　innovation　diffusing　effect　of　electronic　information　industry　in　each　region　above　is　synthetically　compared.　Finally,　the　paper　puts　forward　the　countermeasure　about　how　to　enhance　the　technological　innovation　diffusion＇s　effect　of　industrial　agglomeration.