Taking into account that long strip satellite images have the same error distribution characteristics, we propose a block adjustment method for ZY-3 satellite standard imagery based on strip constraint. First, image point coordinate is calculated in strip coordinate system according to offset value of the adjacent image; Second, RFM of strip image is regenerated by RFM of single images, while generating compensation grid; Third, block adjustment for strip image is implemented based on RFM with affine transformation parameter; Finally, affine transformation parameters of single images are recalculate by the affine transformation parameters of strip image. Experiments of ZY-3 satellite imagery show that block adjustment for satellite imagery based on strip constraint (strip adjustment) can achieve a better result than block adjustment for satellite imagery based on single image under the condition of sparse control. The planar and vertical accuracies of 2.504m and 3.117m in Taihangshan and 2.504m and 3.117m in weinan, respectively, with 6 GCPs. The test results demonstrate the effectiveness and feasibility of the method