The utility model discloses a displacement measuring system for an anchor rod drawing experiment. The device comprises a tripod, the tripod is fixed to a slope through a fixing bolt, a wedge block isattached to the slope of the slope and arranged in the middle of the tripod, a base plate, a jack, a jack piston, a sleeve, an anchor rod and a fixing sleeve are sequentially arranged on the wedge block, and a measuring rope is arranged between the top end of the fixing sleeve and the fixing bolt. The device is simple in structure and convenient to install and test, the wedge-shaped block is mainly used for adjusting the included angle between the slope surface and the axis of the anchor rod so as to ensure that the axis of the jack coincides with the axis of the anchor rod, measurement errorscaused by deflection in the anchor rod loading process are reduced, and the defect that an existing measurement mode cannot measure when the anchor rod deviates is overcome; when the measuring systemis used for measuring, when the anchor rod only deflects and has no displacement, the actual elongation is zero due to the fact that the measured distance is not changed, the displacement generated by rotation is effectively eliminated, and the measuring result is more real and reliable.