The invention discloses an enclosed goaf caving zone stress field evolution actual measurement method. The enclosed goaf caving zone stress field evolution actual measurement method includes the steps: in the Y type ventilation mode condition, measuring the stress during the compacting process of fragmented coal and rock mass in an enclosed goaf, after back production of the coal seam, performingseal retaining of the enclosed wall on gob-side entry retaining at the goaf caving zone side; according to the symmetry principle, when advancing 0.1D, 0.2D, 0.3D, 0.4D, and 0.5D in the working face,drilling 5 groups of boreholes in the enclosed wall bottom, being away from the working face by 10m, to the goaf caving zone side, wherein the separation distance is 0.5m and the depth is respectively0.1L, 0.2L, 0.3L, 0.4L, and 0.5L, and D is the total advancing length of the working face and L is the length of the mining working face; distributing borehole stressmeters at the top of each borehole, and sealing the boreholes; and importing the above actual measurement data into matlab value analysis software, and according to the difference algorithm, solving the magnitude of the compacting stress of any one point of the caving zone.