According to the data of China Customs, China will import 1,232.3 million transformers in 2021, which is 191.91 million less than the same period in 2020 and 14.6% less than the same period last year. Imports amounted to US $8529.73 million, an increase of US $100.9 million over the same period in 2020, or a year-on-year increase of 13.5%.

There are many types of transformers, which can be divided into different types of transformers according to the classification method. For example, it can be divided into number of phases, application, core structure, cooling method and core type. The upstream enterprises of the transformer industry are mainly raw material suppliers, and the midstream enterprises that provide non-ferrous metal raw materials such as silicon steel sheet, copper and aluminum are transformer enterprises, which provide customized transformer product design, manufacturing, assembly and debugging, and after-sales service for downstream enterprises. Downstream application industries are mainly in power supply, power grid, petrochemical, metallurgy, railway transportation, urban construction and other fields. Each sub-industry presents different market demand characteristics.

From the perspective of transformer enterprise echelons, transformer echelons at home and abroad have basically begun to take shape. From the perspective of transformer enterprises, China's transformer enterprises have developed well. It is expected that the transformer industry will continue to increase investment in research and development and achieve development goals such as environmental protection and miniaturization. In the future, the development direction of transformer equipment in China will continue to be energy saving, low noise, fire and explosion prevention, and high reliability. In urban transmission lines, energy saving, miniaturization and high impedance are the key development directions. Environmental protection type underground transformer, dry transformer with good fire resistance and low loss liquid immersed distribution transformer will be more and more widely used.

According to the statistical analysis of the "2022-2027 China transformer Industry in-depth Development Research and the" Fourteenth Five-Year "Enterprise Investment Strategic Planning Report", the transformer is a static motor that can convert alternating current between different levels at the same frequency using the principle of electromagnetic induction. That is, alternating current of voltage and current can be converted to alternating current of different voltages and currents at the same frequency. Transformer is one of the key equipment in power generation, transmission, substation and distribution system. The main structure includes a primary coil, a secondary coil and an iron core. The technical level and production level of the transformer industry directly affect the overall construction and development of China's power industry.

From the current market development situation, China's transformer manufacturing industry will usher in a sustained and stable development period in the next few years. At the same time, with the gradual deepening of China's "energy saving and consumption reduction" policy, the state encourages the development of energy-saving, low-noise, intelligent distribution transformer products.