Sanding device of wood board paint surface sanding machine

The utility model discloses a sanding device of a wood board paint surface sanding machine, which structurally comprises a sanding belt, a height adjuster, a cabinet body, a support frame, a working table, a power switch controller and a movable adjuster. Then, the wood is placed on a workbench to be subjected to sanding work together with a sanding belt, heat generated by a hot air box is absorbed through a heat absorption aluminum sheet in the sanding belt and transmitted into a heat dissipation block, the heat is transmitted into an exhaust channel through the heat dissipation block, a pushing and pressing plate is pushed through a soft rubber block, and a sliding block is attracted to compress a spring; according to the sanding belt drying device, heat in air is evenly discharged from the ventilation plate in the exhaust channel, the sanding belt of the sanding belt drying device is improved, the sanding belt can be automatically dried in the running process of the sanding belt drying device, the sanding