Modularization wire line perforating technology uses monocable to implement the perforator transmitted through oil well. Its design idea is different from the general perforator technology. Perforating gun system adopts the modular design to implement oriented perforation by a special technology. The technology uses the advantage of monocable and oil well to solve the problem in the transmission. The paper focuses on the introduction of the system structure and technological principle of the modularization perforating technology and the application effect of oriented perforation for deviated well .