Special power supply box for display screen

The utility model discloses a special power supply box for a display screen, which comprises a box body, a power supply groove is arranged in the box body, a heat dissipation groove is arranged at the bottom of the power supply groove, a receiving card is fixedly arranged at the top of a mainboard arranged in the power supply groove, a sending card is arranged on one side of the receiving card, a control card is arranged on one side of the sending card, and the control card is arranged on the other side of the sending card. A switch power supply is arranged on one side of the interior of the power supply groove, a temperature sensor is arranged in the power supply groove, heat conduction teeth are connected to the bottom of the mainboard in an attached mode, a centrifugal radiator is arranged in the heat dissipation groove, an air inlet groove is formed in one side of the top of the power supply groove, and a filter pad is connected into the air inlet groove in a sleeved mode. One side of the box body is fixe