In order to analyze distribution characteristics and pressure values of support pressure in 33417 fully mechanized working face in Guandi Mine, field measurement method was adopted. In the designing field mine pressure monitoring station, five drilling holes of different depths in five groups monitored the presupposition pressure, average peak value of the advanced support pressure was about 35 MPa in 33417 fully mechanized working face, the peaking value appeared in front of working face 17 m, the influenced range of advanced support pressure was 49 m, from deep inside the coal seam in front of the working face to advanced support pressure value.