The development of asphalt pavement preventive maintenance technology and the development of asphalt and asphalt concrete technology are closely related to the construction process of expressway network. Throughout the developed countries of the pavement preventive maintenance technology development history, can be divided into three stages. The first stage for the 20th century from the 1920s to the early 80s, the second stage of the 20th century, the early 80s to the late 90s, The third stage is the 20th century, the late 90s to the present. In the first phase, with the development of asphalt and asphalt mixture technology, a large number of preventive maintenance measures have been developed. Such as the slurry coating technology in Germany in the 1920s, the gravel seal technology in South Africa in the 1950s, the SMA technology and microfabrication technology in Germany in the 1960s and 1970s, and 20 The Tank Overlay Technology in France in the Early 1980s. Although the concept of pavement preventive maintenance did not appear at this stage, the above-mentioned preventive conservation measures were gradually mature and applied in large quantities to the conservation works of entities. The introduction of the concept of pavement preventive maintenance technology in China is the introduction of proprietary products such as slurry seal, micro-surface, waterproofing agent and so on with some preventive preventive technical measures or protection of pavement. The paving industry contractor support crack sealing detack concrete vibrator korea grooving machines cutting tool