An automatic hot-melt lamp adhesive for plastic, metal and glass automobile lamps comprises the following components in percent by mass: 20-30% of styrene-isopentadiene-styrene block copolymer with styrene content of 14-16%, 2030% of styrene-ethylene-butene-styrene block copolymer with styrene content of 30-33%, 25-35% of tackifying resin, 5-10% of light calcium carbonate, 5-10% of thermoelectric blast furnace fly ash, 3-8% of process additive, 2-5% of plasticizer and 0.5-1% of antioxidant. The materials sequentially added into a horizontal kneading machine according to a proportion for heating and kneading, injected in a square mould for molding and encapsulated by using release paper after cooled to demould. The automatic hot-melt lam lamp adhesive has the advantages of high bonding strength, good vibration resistance, low cost and environmental protection, and the like.