The invention discloses a method for improving the quality of an electrostatic surface coating of a wooden door. The method for improving the quality of the electrostatic surface coating of the wooden door comprises the steps that the wooden door is prepared; and spraying is conducted, specifically, a grounding conductive board is adopted to be placed on the back side of the wooden door during spraying, and in the electrostatic spraying process, the wooden door is located between an electrostatic spraying gun and the grounding conductive board. By adoption of the method for improving the quality of the electrostatic surface coating of the wooden door, the problems that in the conventional electrostatic spraying process of the wooden door, the thickness of a coating is nonuniform, the painting rate is instable, and painting is difficult during secondary spraying or finish paint spraying can be solved; and meanwhile, no humidification treatment needs to be conducted on the surface of the wooden door, so that the adhesive force of a paint film is not reduced, and the electrostatic spraying quality is improved.