Display screen rear cover convenient for heat dissipation

The utility model belongs to the field of display screen rear covers, and particularly relates to a display screen rear cover convenient for heat dissipation, which comprises a mounting frame, the side surface of the mounting frame is fixedly connected with a heat dissipation cover, the heat dissipation cover is internally provided with a heat dissipation channel, and the top of the heat dissipation channel is provided with a vent hole; according to the utility model, through the arrangement of the heat dissipation channels, when the display panel generates heat, the heat flows through the heat dissipation channels and is finally dissipated through the plurality of groups of ventilation holes, and under the action of the ventilation holes, the heat dissipation performance can be further improved; when the display screen does not need to dissipate heat, the lead screw can be rotated to drive the rack meshed with the lead screw to slide upwards, then the rack drives the gear to rotate anticlockwise, and then th