The utility model discloses a leakproofness has PE gas pipeline of fire prevention function well in gas pipeline technology field, including the PE pipeline, the outer wall of PE pipeline has cup jointed the sealing layer, the outer wall of sealing layer has cup jointed the flame retardant coating, the inner chamber top of flame retardant coating is provided with oxygen ambient silica layer, oxygen ambient silica layer's bottom is provided with fire -retardant layer, the outer wall of flame retardant coating has cup jointed the insulating layer, the outer wall of insulating layer cup joints the matcoveredn, the inner chamber top of protective layer is provided with the wearing layer, with the sealing layer design for the fold form, be the ductility in order to improve the sealing layer, can not the breaking occur when taking place expend with heat and contract with cold, improved the sealing performance and the life of sealing layer like this, inside being equipped with the separation intensity of a fire that the flame retardant coating can be fine and preventing that the intensity of a fire from spreading the pipeline outside the sealing layer, the protective layer is then for the life of improvement pipeline, compare with traditional PE pipeline, the utility model discloses have better leakproofness and fire line.