The invention discloses a weather-resistant PE gas pipe. The raw materials of the pipe include, by weights: 95% to 97% of HDPE (high-density polyethylene), 0.3% to 0.6% of light stabilizer 622, 0.4% to 0.7% of carbon black, 0.3% to 0.7% of TNPP, 0.5% to 0.7% of thioglycol isooctylester, 0.6% to 0.8% of di-n-octyltin moleate, 0.2% to 0.4% of zinc oxide, 0.3% to 0.5% of titanium oxide and 0.4% to 0.6% of clay. The pipe has high light stability and thermal stability and fine oxidation resistance, aging resistance, flame resistance and acid and alkali resistance, the strength, stiffness and modulus of the pipe are maintained, the weather resistance of the pipe is improved, the fine performances can be maintained after long-term usage in complex and changing natural environment, and the fine weather resistance is provided.