Hydraulic hammers belong to percussive foundation piling hammers. According to their structures and principles, hydraulic hammers can be divided into single effect type and double effect type. In brief, the single effect type refers to that the impact hammer core is released rapidly after the hydraulic device is raised to the predetermined height width ratio, and the impact hammer core severely strikes the pile by free falling method; the double effect type refers to that the impact hammer core obtains instantaneous velocity kinetic energy from the hydraulic transmission system to increase the impact speed and severely hit the pile body after the hydraulic device is increased to the predetermined height width ratio. This also matches the two basic pile foundation theories. The single effect hydraulic press foundation pile hammer matches the heavy hammer light driving foundation theory. It is characterized by large hammer core net weight, low impact speed and long hammering efficiency time. The pile hammer has a large penetration per blow, and is integrated into various types of piles with various shapes and materials. The damage rate of pile is low, especially when it is suitable to drive concrete pipe pile. The theory of double effect hydraulic press foundation pile hammer matching light hammer heavy driving foundation is characterized by smaller hammer core net weight, higher impact speed and shorter hammer effect time. It has large impact kinetic energy and is more suitable for driving steel pile.

In Europe in the 75's of the 20th century, with the development trend of intelligent big cities and the continuous improvement of environmental protection policies and regulations, the diesel engine foundation pile hammer, which used to be the main attraction in the sales market of foundation piling, was gradually forbidden to be used because of the problems that its structure could not deal with, namely noise, vibration and kitchen fume pollution. And because of the limitation of heat capacity and high efficiency, theoretically speaking, the impact hammer core quality of larger diesel engine hammer is only more than 15 tons, so the engineering construction regulations of large and medium-sized prefabricated piles can not be considered. In order to find diesel engine foundation pile hammer upgrade to replace commodities, countries around the world will scientific research on new foundation piling machine equipment and construction technology, hydraulic foundation pile hammer is in this situation development trend.

Because of its high efficiency, low noise, small vibration, clean and tidy environment pollution, its innovation has been widely recognized. Nowadays, in western countries, capitalist countries and Asian countries and regions such as Japan, Japan, Macao and Malaysia, the hydraulic foundation pile hammer has already completely replaced the diesel engine foundation pile hammer, and has become the main force of the foundation pile driving sales market. With the development of society, the development of civilized behavior and the development trend of economic development, it is inevitable to replace diesel engine foundation pile hammer with hydraulic foundation pile hammer, which is the representative of national industrial production level and civilized behavior level.