The invention discloses a composite material for an outdoor lamp appliance, belonging to the field of chemical materials. The composite material for the outdoor lamp appliance comprises the following components by weight percent: 45% of EPM<2> ion resin, 3% of adhesion paint material, 2% of antioxidant and ultraviolet ray absorbing agent, 45% of active nano calcium carbonate, 5% of fire-proof agent, 0.25% of liquid dispersant MFA and 0.25% of lubricant E crayon. The invention also discloses a preparation method of the composite environment-friendly material for the outdoor lamp appliance. The composite material for the outdoor lamp appliance has the advantages of simple formulation, low cost, fire resistance, insulation, high strength, favorable toughness, strong paint adhesive attraction and no deformation; the produced lamp product has simple process, easy production, low cost, beautiful appearance, strong stereoscopic performance, vivid line and safety such as fire prevention, insulation and the like, makes up the defect of all the prior materials, and is a great breakthrough in the lamp decorative industry. The invention is suitable for international environmental protection trend, can be recovered and regenerated and has the function of saving social energy sources.