The invention discloses a static voltage stability analysis method for a large-scale wind power collection system. According to different equivalent impedances at collection points of different topological structure wind power collection systems, Q-V curves and voltage stability margins corresponding to various collection topologies are obtained, and accordingly superiority and inferiority of the static voltage stability of different collection topologies are evaluated. Topological planning and designing of the large-scale wind power collection system are considered, it is analyzed out that different reactive power characteristics are obtained when different topological collection systems have different equivalent impedances from the mechanism perspective, it is proposed that node voltage stability margin M indexes are used for static voltage stability evaluation, and the method has the advantages of being simple in calculation and easy to implement and can provide reference for practical engineering design of large-scale wind power fields.