▎ 摘　　要

NOVELTY - Freeze-proof accelerating agent comprises 50-60 wt.% aluminum sulfate, 2-5 wt.% inorganic salt, 0.5- 1 wt.% stable component, 1-3 wt.% antifreeze component, 2-5 wt.% organic complex component, 0.005-0.02 wt.% inorganic nano component, and water (remaining amount). USE - The anti-freezing accelerating agent is useful in preparation raw material and sprayed concrete. The concrete is used in tunnel construction, coal mine reinforcing, and urban road-proof facility repairing. ADVANTAGE - The freeze-proof accelerating agent has synergetic effect, and is stable under low temperature environment. When adding concrete, the coagulation time of the concrete is shortened, and the early and late strength of concrete is improved. The concrete is used for spraying concrete and the resilience rate can be reduced. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a preparation method of freeze-proof accelerating agent; and (2) an injection concrete.