A few days ago, a major breakthrough was made in the steady-state strong magnetic field experimental device of the national major scientific and technological infrastructure, which generated a steady-state magnetic field with a field strength of 452200 Gauss, setting a new world record for the same type of magnet in the past 23 years. The experimental conditions of steady-state strong magnetic field are of great value in the fields of physics, chemistry, materials, life science and other disciplines. The birth of the new record shows that China has the internationally leading experimental conditions of steady-state strong magnetic field, which can provide strong support for scientific researchers to explore the material world. On August 12, the high field magnet operation monitoring center of the strong magnetic field science center of Hefei Institute of Physical Sciences, Chinese Academy of Sciences. The large LCD screen and rows of computer screens are full of various charts and data. During the experiment, some people point to the numbers on the screen and communicate with people around them in a low voice from time to time. However, for this young team whose average age of scientific research backbone is only 35 years old, the latest data obtained by them is of great significance. In the afternoon of the same day, Hefei Institute of material science, Chinese Academy of Sciences held a press conference to announce that the national steady-state strong magnetic field experimental device developed by the strong magnetic field science center of the Academy had reached the "scientific and technological peak". Its hybrid magnet (magnet diameter 32 mm) produced a steady-state magnetic field of 452200 Gauss (i.e. 45.22 Tesla), breaking the world record of the same type of magnet, It has become the highest stable magnetic field that can support scientific research in the world. An expert group composed of many academicians of the Chinese Academy of Sciences and the Chinese Academy of Engineering identified that the achievement reached the international leading level. What is the steady-state strong magnetic field, what is its role, and what does the new world record mean? A strong magnetic field creates extreme experimental conditions for material science research. As we know, an energized solenoid will generate a magnetic field. The larger the current, the stronger the magnetic field. The magnet in the steady-state strong magnetic field experimental device is designed based on this basic principle. However, as the current increases, the electromagnetic force received by the conductor increases sharply, and the heat in the magnet becomes unusually large. Therefore, it is necessary to form a stronger, stable and controlled magnetic field through more precise, stable and advanced materials and processing technology. How strong is the magnetic field? The earth's magnetic field is about 0.5 Gauss. The strength of this 0.5 Gauss is enough to pry the compass and make the pointer accurately rotate in any direction on the earth to point south. The world record breaking 452200 Gauss is equivalent to more than 900000 times of the earth's magnetic field. "If you want to do something well, you must first sharpen your tools.". The steady-state strong magnetic field is an extreme experimental condition required by the research of material science, and is also a sharp weapon to promote major scientific discoveries. Under the strong magnetic field experimental environment, the characteristics of matter will be regulated, which is conducive to scientists to discover new phenomena and explore new laws of matter. In recent years, strong magnetic field plays an important role in many research fields. On the one hand, strong magnetic field can induce new states. A strong magnetic field can effectively regulate the charge, spin, orbit, etc. in the material, and make it appear a new quantum state, thus presenting a wealth of new phenomena. On the other hand, strong magnetic fields can give birth to new major application technologies