The invention discloses a wind power system time domain full-amount longitudinal protection method based on fault model discrimination. The method comprises the steps of through performing characteristic analysis on different time domain full-amount fault models in and out of a cluster wind power feeding-out line area, presenting a resistive characteristic when different voltage and a fault in a current time domain full-amount information area are acquired; presenting the capacitive characteristic outside the area, therefore presenting two protecting principles based on resistive/capacitive model correlation discrimination, and further constructing a correlation discriminant and protection criteria of the two protecting principles. A simulation result shows that correlation discriminationlongitudinal protection of the two time-domain full-amount fault models based on the resistive/capacitive model correlation discrimination method are suitable for cluster wind power feeding-out line.The wind power system time domain full-amount longitudinal protection method is advantageous in that no influence by back-side impedance change, weak feeding property, frequency offset and high harmonics of the wind power system is realized; when a fault of the long-distance feeding-out line occurs, high reliability of the protection action can be realized; and furthermore the wind power system time domain full-amount longitudinal protection method has relatively high anti-transition-resistance performance.