The invention provides an electronic component moisture-proof box which comprises a box, a sliding wheel, a first separating plate, a second separating plate, a first vent hole, a second vent hole, a third vent hole, a temperature sensor, a control panel, a first moisture eliminating device and a second moisture eliminating device. The first separating plate and the second separating plate are each provided with a plurality of through holes evenly, different electronic components are placed on the first separating plate and the second separating plate, and starting and stopping of a heater are controlled through the control panel. According to the electronic component moisture-proof box, the first separating plate and the second separating plate are arranged, the two kinds of electronic components can be placed at the same time, the separating plates are communicated, the three vent holes are formed, and therefore air flowing in the box is accelerated; the moisture eliminating devices and a ventilating plant are arranged, and therefore the humidity in the box is constant, moisture proofing of the electronic components are facilitated, operation and storage are facilitated, the moisture-proof effect is good, use by an operator is facilitated, safety is guaranteed, and the production cost is reduced.