Fuente: WIPO "hemp" The utility model provides a light supplementing device of an industrial hemp planting bed, which comprises a rack, a planting table and a light supplementing lamp are arranged on the rack, the light supplementing lamp is arranged above the planting table, a light supplementing film is arranged between the light supplementing lamp and the planting table, and light of the light supplementing lamp irradiates the planting table through the light supplementing film; a light-isolating structure is arranged between the light-supplementing film and the light-supplementing lamp, the light-isolating structure comprises a transparent light-isolating plate, a groove is formed in the upper side face of the light-isolating plate, water is contained in the groove, and light rays of the light-supplementing lamp penetrate through the planting table and irradiate the light-supplementing film.