Needle knife, that is, a needle with an edge, or a needle with an edge. It is also called a small needle knife because of its short incision. The blade of a needle knife, depending on the disease being treated, has a flat blade, oblique blade, sickle-shaped blade, cone-shaped blade, concave blade, and other differences, but the most commonly used is the flat blade. This article introduces several styles of flat-bladed needle knives used to treat various types of chronic soft tissue injury diseases. Clinically common, Beijing production of the Hanzhang brand needle knife, according to its length, can be divided into 1, 2, 3, 4, No. 1 12cm long, No. 2 9cm long, No. 3 7cm long, No. 4 4cm long. The flat side of the needle shank shows the direction of the blade. The needle body and the shank are stainless steel one-piece connection, the shank is thick, the same as the eight-sided long column for dental surgery, about 9cm long, similar to the diameter of about 5mm, the side or tail plane of the shank marks the direction of the blade. The side or tail plane of the needle handle indicates the direction of the incision. Compared with the Hanzhang needle knife, the blade of the Hanzhang needle knife is sharp and easy to cut and separate, but its needle body is slender, so care should be taken to prevent the occurrence of bending and breaking the needle when loosening the swing. Hanzhang needle knife needle handle in its tail, the operation must be assisted by the pressure hand into the needle, but the pressure hand is a double-edged sword, its advantage is easy to enter the needle, easy to accurately pierce the site, but also to pay attention to, such as pressure in the nerve, blood vessels, also easy to be pierced. Hanzhang needle knife because of the small incision, ordinary medical workers easy to grasp. Hai Pai needle knife needle body is thick, the needle handle is long, hold the needle feel good, can not have to escort hand, even if the stabbing site has nerves, blood vessels, but because there is no compression fixed, nerves, blood vessels can also mostly slip off, because of its long incision, can make the frequency of cutting reduced, unless must be used in the horizontal more cut, most cases longitudinal less cut, this is because the needle body is thick, easy to swing the needle body to loosen the local, but because of the length of the knife More than 50% of the general needle knife, the relevant anatomy is not absolutely fine people are afraid to apply. Its all stainless steel products, more than ten times the weight of the former, excellent quality material.