Abstract: Abstract:This paper points out that therir is strong hypothesis in the studies of mode of trade in services which use the gravity model. So we put forth a new way of empirical study. Our empirical study based on panel data model with GLA method shows that different trade in producer services has different mode. EFW, language and culture are the most important factors. We put forth suggestions that China should choose the countries which have the same culture, language or tradition to sign regional economic agreements for fully liberalization of trade in producer services