Nowadays research of short-circuit current for doubly-fed wind generation is mainly based on the method of the traditional flux linkage analysis. A novel calculation method of stator and rotor short-circuit current is proposed. The method deals with fault network following a three-phase symmetrical short-circuit fault as superposition of normal operation network and fault superimposed network. On this basis, the influence of the terminal phase jump and the rotor side converter control is considered. And from the perspective of function decoupling, fault superimposed network is further decomposed into the stator side fault superimposed network and the rotor side fault superimposed network. Then the increment of stator and rotor short circuit currents of fault superimposed network is calculated by using Laplace transform method. And the analytical expression of the total current is deduced. Finally, the effectiveness of the expression is proved by the simulation and dynamic model experiment results. It is of great significance for the short circuit current calculation and relay protection setting of the power system with doubly-fed wind power generator. This work is supported by Science and Technology Project of SGCC (No. PD71-15-043), National Basic Research Program of China (973 Program) (No. 2012CB215206), and Fundamental Research Funds for the Chinese Universities (No. 2014ZZD02).