Abstract: A linear monocular vision determination method is proposed based on feature point extraction for orbit target capture. With a consideration of the interference from the highlight facula, the feature point extraction method based on geometry index threshold is designed, and the influence from highlight facula posed on the extraction is obviously suppressed. After that, the relative pose and position determination algorithm is developed based on nonlinear terms transformation. Compared with the nonlinear propagation method, the proposed method can work stably with low computation load. Finally the ground-based monocular vision system is established, and he vision determination experiments are carried out when target is floating slowly. The accuracy and real time performance of the vision determination method are illustrated by simulation results.