The invention relates to the technical field of landslide research, in particular to a fast extraction method of a highway landslide area. The fast extraction method includes: acquiring a highway landslide sample and a study area image; acquiring a landslide sample area spectrum characteristic value; designing a new remote sensing index NDRLI; determining a potential highway-induced landslide area; designing a spectral curve shape index SISC; eliminating the water, cultivated lands, bare lands, shadow areas, building lands and land features with the slope less than 20 degrees in the potentialhighway-induced landslide area; and finally obtaining the highway landslide. Compared with the existing common methods, the invention has the advantages of small workload, short consumption time, highefficiency, easy data acquisition and high classification accuracy, provides a scientific basis for studying and analyzing the landslide disaster along the highway, and has the prospect of large-scale promotion and application.