Abstract: The automatic detection of position and posture of roadheader is one of the key problems for the automatic control of roadheader.The paper analyzed effects that position and posture of boom-type roadheader on tunnel excavation combining with structure and working mode of boom-type roadheader,and proposed an automatic detecting method of position and posture of boom-type roadheader based on laser guide.In addition,the feasibility of the proposed method was analyzed.