Abstract: In the 20th century, now a thing of the past relative sharp large scale industrialized economies in many countries, people began to worry about, this growth trend may cause adverse effect to the national economic development. This paper discusses the relationship between government activities and economic growth .First of all, based on the analysis of the statistics, reviews the parts of the country's public sector long-term growth state of the economy, and explain the cause of the economic state is intrinsic to the political system functions inefficient government; Further discussed, for the development of the economy, government intervention may be the main reason for the positive or negative effects; Proved by pendulum, the government public expenditure, especially those of public spending in response to market failure, often is good for growth, most of the taxes hinder the economic development; The article finally points out some defects existing in the empirical study.