The invention discloses a flame-retardant reinforcing PBT (Polybutylece Terephthalate) composite material with an excellent laser printing effect. The material consists of the following raw material components in parts by weight: 40-50 parts of PBT resin, 15-25 parts of a flame retardant, 3-5 parts of a flame retardant synergist, 15-30 parts of glass fiber, 2-5 parts of a toughening agent, 0.5-1.5 parts of a laser labeling agent, 3-5 parts of laser labeling synergistic effect resin and 0.2-0.4 part of an antioxidant. Through comprehensive evaluation on material properties and processing properties, the PBT resin of a specific viscosity coefficient is selected, meanwhile a toughening and flame retardant system is effectively screened, an effective additive scheme is developed for material laser printing effects, and the prepared PBT composite material is excellent in flame retardancy and mechanical property, and meanwhile has a very good laser printing effect.