Abstract
　　Drilling machinery is widely used in excavation, construction and other filed. In despite of the world Hydraulic rock drill sespecially Hydraulic rock drill technology had great developed, in our country the main product of rock drill had little change in recent decade . A large number of small and medium-sized mining in our country and the general engineering construction in common use is still high energy consumption, broken rock the efficiency is low, the more vulnerable parts, life expectancy, noise is high, the pollution of the environment a pneumatic drill machine, leg type developed light independent rotary hydraulic drill machine is in this context of the proposed. With light independent to replace the traditional aerodynamic rotary drill machine more drilling can obviously increase efficiency, reduce energy consumption, significantly lower noise pollution and air pollution, the rapid increase of drilling engineering construction and our equipment technology level.
　　 hydraulic drill machine working principle and light hydraulic drill machine all the structures are put forward, based on the back of the hydraulic drill machine light independent type structure, the main components of the design and research. In the design, this paper is to design the hydraulic system of hydraulic drill machine, which include: the design with flow valve system design; The design of the accumulator; The piston air defense play device design; Hydraulic impact mechanism hydraulic control principle diagram.
　　According to the design of hydraulic drill machine, using a computer aided design software AUTO CAD2007 and CAXA2005 draw its assembly drawings and some typical parts drawing, then analyses the research, understand the structure and principle, the design of the achievements, to deepen further consolidate the final purpose of the design.
　　
　　Keywords：Drill machine; Design; Light; Independent turned; Research; Impact mechanism ; strike machine