Since 1980s of the 20

th

Century

outbreak of oriental migratory locust has rampantly emerged again in some regions of China.It is particularly important to monitor timely and accurately the intensity of damage from oriental migratory locust（Locusta migratoria manilensis Meyen） for realizing efficient control and prevention of this kind of insect pest.In this study Huanghua County of Hebei province was chosen as the study area and based on the hyper-spectra data measured at ground surface

the difference in canopy reflectance spectra and the characteristic parameters of hyper-spectra data were analyzed and compared for the reeds in normal growing condition and for those under damaging from locust.In addition

five kinds of model were developed to reflect the relations between the characteristic parameters of hyper-spectra and Leaf Area Index（LAI） of reeds.The results show that among those indices the locust damage spectra index（DSI） is one which is mostly suitable to use in indicating the intensity of locust damage in the study area.Following this step

a classification scheme for the locust damage intensity was worked out based on DSI data for use in the study area

i.e.no damage if DSI is over 62.856

slight damage if DSI is between 41.254 and 59.496

and serious damage if DSI is less than 41.254.