With the development of automobile technology, the structure of modern carburetor has been constantly improved, resulting in different carburetor models and more complex structures, but their basic structures are the same as the main oil supply system, the concentrated oil supply system, the accelerating oil supply system, the idle fuel supply system and the starting oil supply system. The main function is not the same, but also provides good mixture for the engine. It can quickly and easily adjust the gas mixture into the engine, and adjust the composition of the mixture automatically while adjusting the number of mixed gas. The technical status of carburetor is directly related to the fuel consumption of automobiles, and affects the economic performance of automobiles. Therefore, the users of automobiles should pay great attention to whether the carburetor is in good condition and check and adjust in time.