Multi-base line photogrammetry with big rotation angles is needed to obtain the information of the target.The paper presents formulas of dependent relative orientation in multi-base line photogrammetry.With the baseline components and direction cosines as the parameters,photos can be taken at any place and with any rotation angles,without any limitation on the initial values.And also another method is introduced to solve the same problem.The experiments with no-metric cameras on experiment field prove that the elements of relative orientation can be correctly calculated with both of these two algorithms.