中文摘要：

以投入产出理论为基础构建服务业自我循环效应分析模型。该模型将服务业的自我循环效应和制造业服务需求进行区分、比较，并且运用结构分解技术分析服务业自我循环变动的根源及各基本因素的影响程度。对陕西省的实证研究表明，陕西省服务业具有较强的自我循环效应，但产业分工仍处于初级水平。推进生产服务的外部化、专业化是促进服务业发展关键。

英文摘要：

The paper constructs an analysis model to explore the self - reliance effect on the basis of Input - output Analysis. The model distinguishes and compares the self - reliance effect of services and the demand relationship between the manufacturing and services. And it analyses influencing factors about the self - reliance effect of services by using Structural Decomposition Analysis （SDA）. The Empirical Research in Shanxi Province suggests that the services has a strong self - reliance effect, however industries division is still in the primary level. So promoting the producer service to be more external and specialized is the key to develop services.