With the increasingly dense distribution of transmission lines, the possibility of fault at the crossing point of two transmission lines is intensively increasing. The existing short circuit calculation can only deal with the complex fault types with multi-point while it is unable to deal with the complex fault at the same crossing position with multi-span points. Therefore, this paper presents a short circuit current calculation method for crossing fault types with multi-span points. Firstly the sequence network equations at the fault point of two crossing transmission lines are constructed, and a general fault topology for complex fault with multi-span points is established. Then, the fault boundary condition equations for crossing fault port of two transmission lines are constructed based on phases. The phase sequence transformation is used to convert the fault boundary condition equations for each order network, and the fault current and voltage are solved by jointing the sequence network equations. Finally, a fault simulation model of power network is constructed by PSCAD/EMTDC, and the results verify the correctness of the method.