The invention relates to an LED (light emitting diode) illumination technique, in particular to an LED plant lamp based on chlorophyll absorption spectrum feature design. The LED plant lamp adopts the technical scheme that the LED plant lamp based on the chlorophyll absorption spectrum feature design comprises a light emitting body, a casing, a power source, a first controller, a second controller and wiring terminals, wherein the light emitting body is provided with a first LED light source module and a second LED light source module, the first LED light source module is used for outputting spectrum which is matched with absorption curve spectrum features of chlorophyll a, the second LED light source module is used for outputting spectrum which is matched with the absorption curve spectrum feature of chlorophyll b, the first controller is arranged in the casing, is electrically connected with the power source and is used for controlling the light emitting intensity of the first LED light source module, the second controller is arranged in the casing, is electrically connected with the power source and is used for controlling the light emitting intensity of the second LED light source module, and each wiring terminal is arranged on the casing, and is used for electrically connecting the corresponding controller and the corresponding LED light source module. The LED plant lamp has the advantages that the growth of plants is well promoted, the light intensity of different LED light source modules can be conveniently adjusted, and the requirements of different plants are met.