<p>Oceans and saline soil environments strongly demand for concrete with high compressive strength and high chlorine salt corrosion resistance. Herein, a new preparation process of geopolymer concrete with high compressive strength and chlorine salt corrosion resistance was established, and the process was optimized by adjusting the water/cement ratio, the proportion of Na₂O and the amount of fly ash. Mechanical properties tests show that the compressive strength of geopolymer concrete increases with increase in Na₂O proportion but decreases with increase in water/cement ratio and fly ash. The compressive strength of geopolymer concrete is as high as 96.20&#xa0;MPa, when the water/cement ratio is 0.6, the proportion of Na₂O is 0.12, and the amount of fly ash is 10%. This may be because the C-(A)-S–H gel makes the geopolymer concrete denser. At the same time, electrochemical impedance spectroscopy and Tafel results imply that the geopolymer concrete also has great chlorine salt corrosion resistance, the lowest weight loss rate of steel bar is only 0.06% after 240&#xa0;h accelerated corrosion. The leaching tests indicate that at the same depth, the total and free chloride ions in geopolymer concrete are minimum and some chloride ions are combined. The high chlorine salt corrosion resistance could be attributed to the increase in C-(A)-S–H gel which refines the pore structure of concrete, improves concrete compactness and binds the chloride ions. This paper provides a new method for the high-quality utilization of solid waste and a potential clue for the preparation of high-performance concrete.</p>