Hydraulic technology has a history of more than 200 years since the world's first hydraulic press was made in Britain in 1795, but it was not until the middle of the 20th century that it was truly popularized in industry. During the second world war, hydraulic transmission and control devices with high power, fast reaction and accurate movement were used on some weapons and equipment, which greatly improved the performance of weapons and equipment. At the same time, it also accelerated the development of hydraulic technology itself. After the war, hydraulic technology was quickly transferred from military to civil use, and was widely used and developed in the fields of mechanical manufacturing, engineering machinery, forging and pressing machinery, metallurgical machinery, automobile, ship and so on. After 1960s, the rapid development of atomic energy technology, space technology, electronic technology and so on pushed forward the hydraulic technology again, making it more widely used in various industrial fields.