Purpose To establish a new technique for isolation and purification of alkamides from Echinacea Purpurea.Methods In n-hexane:ethyl acetate:methanol:water(2∶ 5∶ 5∶ 3) solvent system,alkamides were isolated by high-speed counter current chromatography from petroleum ether extraction of Echinacea Purpurea root,then the compounds of alkamides purified by the prepared HPLC,and the structures were established on the basis of MS,1^H NMR,and 13^C NMR.Results Eight compounds were obtained by purification of 94.43%,96.80%,98.89%,98.22%,96.42%,98....