The invention discloses a double-liquid process grouting material and a grouting process of the grouting material. The grouting material consists of cement paste and an additive solution, wherein the additive is prepared by mixing 0.38 parts by weight of sodium metasilicate, 0.12 parts by weight of lithium poatassium and 0.5 parts by weight of calcium chloride; and the grouting process comprises respectively preparing paste materials and instantly mixing and grouting via a special double-liquid grouting paste plug. The grouting material disclosed by the invention satisfies the requirement on dam curtain grouting in regions with high cold, low temperature and large temperature difference day and night; the processes of adding complex components are simplified due to the adoption of the processes of randomly mixing, instantly pouring and grouting; and the additive is mixed with cement paste liquid in a hole through double-liquid grouting, so that the conflict between the pumping time and the setting time of the paste liquid is solved. Due to the preparation method, not only the diffusion of the cement paste liquid is effectively controlled and the re-grouting time is reduced, but also the problem of big control difficulty in the setting time of the paste liquid is solved, so that the investment is effectively reduced, the grouting period is shortened, and the grouting quality conforms to the engineering quality requirement.