The invention discloses an asphalt and concrete highway pavement protective solution, which includes, by weight, 110-130 parts of an antifreeze component sodium nitrite, 40-65 parts of an early-strength component anhydrous sodium sulfate, 20-35 parts of a modifier, 5-7 parts of an activator, 6-8 parts of sodium acetate, 4-6 parts of a compound water repellent, 600-800 parts of hot water, and 60-90 parts of a polycarboxylate high-performance water reducer. By means of the sodium nitrite and the anhydrous sodium sulfate, the antifreeze and snow-thawing properties of the protective solution are improved, which has important meanings to Northern cold regions. The polycarboxylate high-performance water reducer is the most novel high-performance water reducer at home and abroad at present, and has certain water resistance and low temperature resistance, so than when being matched with the activator, the polycarboxylate high-performance water reducer can greatly improve functions of the protective solution. The protective solution improves durability and delays maintenance period of the highway pavement.