Abstract: Toutunhe formation of the Middle Jurassic in slope area of eastern Fukang sag (Fudong slope area) in Junggar basin is a significant exploration target zone in this region. Based on the measured formation pressure data from key wells in this study area, this paper analyzed the vertical and horizontal distributions of abnormal high pressure in Toutunhe formation, presented three zones such as ultra?intense pressure zone, transition to overpressure zone and normal pressure zone in terms of the pressure coefficients, and discussed the formation mechanisms of these abnormal pressure zones by means of drilling, seismic, logging and thin?section data. The influencing factors for forming the abnormal pressure in this area are sedimentary facies and diagenesis as well as tectonic movement. The formation of the regional abnormal pressure is the result of multifactor combined actions, among which the tectonic movement is the key factor