Compactors are capital-intensive, technology-intensive and relations with related industrial products, involving wide technical, business, such as the improvement of product technology content, need many supporting manufacturers close cooperation, about 60% - 70% of the fittings should be advanced. The main content of the main content is the overall design of the product, the manufacture of structural parts, and the purchase and assembly of the products. After more than 40 years of continuous development, China road roller industry has made great progress. Especially since the 90 s, the roller to the rapid growth of the production in roller production enterprises continue to increase, the roller up to more than 80 manufacturing enterprises, can produce 5-30 t vibratory roller, 4-24 16-30 t t static grinding roller and tyre roller more complete with complete specifications and varieties of products, such as the basic form to independent development and production of complete roller manufacturing system, and its technical level and international advanced level is gradually narrowing the gap between. This kind of high - speed growth situation, will inevitably drive the roller - engine matching industry to a new development period. In 2007, is the national important year in the eleventh five-year plan, further intensify the efforts in highway construction, highway construction around the early, to a certain extent, driven by increased demand purchasing roller across the country sales reached 9841 units in 2007, lasted for growth. Sales of road roller continue to maintain the trend of growth, from January to June, 18 road roller companies sold a total of 6,086 road rollers. Sales of major products increased by 16.43% over the same period in 2007.