As people on the improvement of auto humanization, comfortable, and the world of the production and sale of automotive relay is on the rise step by step. To 2010, such as average production per car usage, maintenance dosage of 10, only 20 car replacement amount calculated on ownership in 10% of the reference number, the automobile relay market demand will exceed 2.5 billion only. Thus, automobile relay development space is enormous. Global relay in 2004 sales of 42.7 billion yuan, including automobile relay sales of 7.9 billion yuan. Automobile relay attractive market prospects for our country's automobile relay industry provides a good opportunity of development. Now auto relay market of our country is given priority to with big automotive group, at the same time, with emphasis on the introduction of cars and light buses localization experience, service market has more obvious regionality, at the same time give priority to with direct marketing model, there is no set up the perfect distribution system, automobile relay manufacturer mainly manufacturing-according-to-sale, give priority to with pin expansion. Our country automobile relay market at the same time of expanding domestic demand, with the international standards of product quality, gradually become indirect export for direct export, the establishment of a regional international marketing combination. Car special control relay production trend in China mostly in two aspects, one is imitation of Germany and France (or technology imported from Germany, France and other countries) is given priority to, for European models; Second is imitation, give priority to, for Japanese, Korean cars. At present domestic automobile relay manufacturer mainly with xiamen sound macro power generation co., LTD., Shanghai automobile electric appliances co., LTD., guizhou the meaning of a day. The xiamen hongfa company are a professional manufacturer of relays, relay annual production capacity of 250 million. 2004 automobile relay output ranked first in China. The fuzhou hongfa company production car relay consists of three broad categories: PCB relay, interposing relay and intelligent combination relay. And the current world automobile relay output to a tyco, next with OMRON, matsushita electric, Fujitsu, NEC, - east, etc. Automobile relay refers to the specific application in automobile electric control relay, it is with the development of automotive electronics, electrical appliances. The auto industry is the second largest application areas after the communications relay market, sales of auto relay accounts for about 18.4% of total sales of relay. Automobile relay control is widely used in auto starting, preheating, air conditioning, lights, wiper, efi, oil pump, security, audio, navigation, electric fan, cooling fan, electric Windows, air bags, anti-lock braking and suspension control and automotive electronic instrument and fault diagnosis system, it is second only to the sensor in the car one of the most used car electronic components. Applications in the future market, car transfer from 14 v to 42 v power system and the development of new electric cars and hybrid cars, for the relay application in the field of car opens up a new market opportunities.