The invention relates to the field of paint spraying, and particularly discloses a paint-spraying device with a desusting and drying integrated structure. The paint-spraying device comprises a shell,a conveying belt, a feeding inlet, a discharging outlet and a paint collection tank, wherein a dust suction hood, an installation support and a drying cavity are arranged / formed above the conveying belt from left to right in sequence; a plurality of brush rollers are arranged below the dust suction hood, the dust suction hood is communicated with a dust suction blower, and the installation supportis fixedly connected with an electrical telescoping rod which stretches and retracts in the vertical direction; a vertical hot air suction pipe is arranged on the outer portion on the left side of the drying cavity, and a wind deflector with adjustable height is arranged on the left side of the hot air suction pipe. By means of the drying cavity, the paint on the surface of wood can be quickly dried, meanwhile, hot air overflows outwards can be recycled, the hot air is prevented from flowing to the position of a paint sprayer, the paint is prevented from being dried in the sprayer, it is ensured that the paint sprayer is used for a long time, and the service life is prolonged.