Driven by the new market demand, the update and optimization of transmission equipment has become more urgent. Domestic transmission equipment manufacturers fully tap the market potential, and vigorously develop large environmental protection and energy saving transmission equipment, which has played a positive role in the rapid development of agriculture from manual operation to mechanization. Generally, enterprises producing large transmission equipment have strict requirements for transmission efficiency indicators. All production equipment enterprises should fully consider the various problems that may occur in the operation of the equipment, in order to reduce the noise and heavy pollution caused by equipment vibration or improper operation.R& D, The manufacture of domestic combined transmissions should meet the global call for low carbon economy and durability. Increasing the research and development and production of new and diversified transmission is the general trend of industrial development, and also to meet the needs of domestic infrastructure development.The development of automobile combination transmission is closely related to the progress of human society and the level of science and technology. With the development of science and technology, various disciplines permeate each other, various industries communicate with each other, and new structures, new materials and new technologies are widely used. At present, the combined transmission of automobile is developing towards the direction of large-scale, high efficiency, reliability, energy saving, consumption reduction and automation.