This chapter describes the the expansion of the economic protection’s mechanism,the types and characteristics of the economic protection’s mechanism, the characteristics of the economic protection’s mechanism. 1. What is the expansion of the economic protection’s mechanism? - This material explains about The economic protection's mechanism is policy system, Use the policy and Measure and protection tools, The government planned to focus on the basic effect of national income, Modern Economic Period. 2. The origin and the expansion of the economic protection’s mechanism. - This material explains about the government has taken on the rule of economic protection, theory of economic protection’s mechanism, before the economist Adam Smith (before 1776), interferes of governments. 3. What are the types and characteristic of the economic protection’s mechanism? - This material explains about Market mechanism with competition, Market mechanism with absolute, Arrangement and discouragement of market mechanism.