A solar energy warning board is disclosed and comprises a solar panel, an upper cross bar, a lower cross bar, a warning board main body intersecting framework, LED lamps, an illuminating warning board, an alarm, an indication board and an antitheft apparatus, wherein the solar panel is arranged on a side face of the warning board main body intersecting framework, the upper cross bar and the lower cross bar are arranged on the warning board main body intersecting framework, the LED lamps are arranged in the warning board main body intersecting framework and are connected with the solar panel, the illuminating warning board is arranged on an upper part of the warning board main body intersecting framework and is connected with the solar panel, the alarm and the indication board are arranged in the warning board main body intersecting framework, and the antitheft apparatus is arranged on the lower cross bar and is connected with a monitoring host computer via an internal remote control module. The solar energy warning board disclosed in the invention is advantageous in that problems of poor anti-corrosion performance, short illumination distance of warning light, single shape and antitheft performance in a conventional solar energy warning board can be solved. The solar energy warning board is strong in antitheft performance; when the solar panel or the warning board is dismounted, a warning device is started and looping alarm sound is emitted.