The invention discloses a method for analyzing the harmonic interaction between units in a direct-driven wind field based on an alpha-beta coordinate system, which comprises the steps of 1 tracking reference current by adopting QPR (Quasi-Proportional Resonance) control based on the alpha-beta coordinate system, suppressing LCL inherent resonance by using capacitive current feedback in consideration of inverter delay, and establishing a Norton equivalent circuit of a direct-driven wind turbine; 2 building a direct-driven wind field transfer function matrix model by combining the topology structure of the wind field; and 3 quantitatively analyzing the influence rule of different control parameters, power grid equivalent inductance and wind turbine numbers on the harmonic interaction betweenthe units based on the RGA (Relative Gain Array) principle. The method can quantitatively analyze the harmonic interaction between unit current control circuits in the direct-driven wind field underdifferent control parameters, power grid equivalent inductances and wind turbine numbers, thereby guiding the parameter design of the direct-driven wind turbine so as to maintain the normal operationstability of the wind field.