Agricultural product trade market is traditional mode of China's agricultural product circulation terminal. Recent years, agricultural product market is changed to supermarket, which appears in big and medium-sized cities and is an important step to promote urban market construction, standardize circulation order and promote circulation efficiency. It has become an important action to modify the city construction, and is also an important innovation attempt of the usual circulation mode of the primary products. In this article, the author has generally analyzed obstacle factors of the alteration to terminal market in these cities, and probed into its necessity and countermeasures.