Provided is a paint decoration body structure with a theme effect and a construction method of the paint decoration body structure. The paint decoration body structure comprises a decoration body with a working face, a seal paint layer is coated on the outer side of the working face, a primer paint layer is coated on the outer side of the seal paint layer, a theme paint layer is arranged on the outer side of the primer paint layer, and a cover paint layer is coated on the outer side of the theme paint layer. According to the paint decoration body structure with the theme effect and the construction method of the paint decoration body structure, the operation is simple, the process is clear and definite, the final effect is stable and consistent, an industrial standard is provided for application of a theme paint, the construction cost is saved and huge economic benefits are obtained.