The invention discloses a production method of a flame-retardant reflective warning tape. The method is characterized by comprising the following steps of 1, implantation of beads, wherein a PE layer I (1) in a PET-PE composite membrane I is heated and softened, then glass beads (2) are embedded in the PE layer I (1), the glass beads (2) are coated with an adhesive, and baking is carried out; 2, membrane covering at intervals, wherein PE layers II in a PET-PE composite membrane II after segmentation are heated and softened, and then the PE layers II are attached with equal distances to obtain spaced bead implantation membranes; 3, aluminizing, wherein the spaced bead implantation membranes in the second step are aluminized to obtain aluminized layers (4), and the PET-PE composite membrane II embedded in focusing layers (3) is peeled off; 4, recombination, wherein an adhesive layer of a pretreated base fabric and adhesive layers of pretreated spaced aluminized bead implantation membranes are recombined to form a flame-retardant adhesive layer (7), the PET-PE composite membrane I embedded on the surfaces of the glass beads (2) is peeled off, and the flame-retardant reflective warning tape is obtained. The production method of the flame-retardant reflective warning tape has the advantages of being simple in process, flat and smooth in touch and obvious in boundary.