Provided is an LED display screen. A first heat radiating device is arranged in a box body, modules are arranged in a matrix mode on the front end face of the box body, a rear cover is fixed on the rear end face of the box body, a connecting mode of the rear cover and the box body is a detachable connecting mode, heat radiating holes are formed in the rear cover, and the modules comprise face covers, LED lamp plates and module housings. The front sides of the LED lamp plates are LED welding faces, LED light-emitting tubes are welded on the LED welding faces, the back sides of the LED lamp plates are integrated circuit welding faces, and second heat radiating devices are added on the integrated circuit welding faces of the LED lamp plates and are thermo-magnetic heat radiators. The LED display screen has the advantages of being light in weight, low in cost, good in heat radiating effect, stable in light efficiency and power, energy-saving and environment-friendly. In addition, the lumens depreciation of the LED light-emitting tubes is very low, the service life of the LED display screen is prolonged, and fault occurrence probability is reduced.