The invention discloses an efficient flame retardant polyolefin composition. The efficient flame retardant polyolefin composition is prepared from the following raw materials in percentage by mass: 90.7-99% percent of polypropylene, 0.4-4 percent of hypophosphite, 0.1-2 percent of melamine hydrobromide, 0.2-2 percent of flame retardant synergist, 0.1-0.3 percent of lubricant EBS, 0.1-0.5 percent of main antioxidant and 0.1-0.5 percent of secondary antioxidant, wherein the flame retardant synergist is a polymeric mixture generated by a polymerization reaction between an isopropyl benzene compound and diisopropylbenzene. The efficient flame retardant polyolefin composition has efficient flame retardancy; in the raw materials, the hypophosphite is taken as a phosphorus-based flame retardant, the melamine hydrobromide is taken as a brominated flame retardant, and the polymeric mixture generated by the polymerization reaction between the isopropyl benzene compound and the diisopropylbenzene is taken as the flame retardant synergist; an added hypophosphite/melamine hydrobromide/flame retardant synergist flame retardant system had no influence on the mechanical property of the polypropylene.