Liquid alkali-free accelerator and preparation method thereof

The invention relates to the technical field of accelerators, in particular to a liquid alkali-free accelerator and a preparation method thereof. According to the liquid alkali-free accelerator and the preparation method thereof, by using modified alcohol amine, CH crystallization is inhibited, a complex is formed with Al plasma, hydration of C3A is promoted in early cement hydration, the diffusion rate of hydration products is increased, the incubation period of the cement hydration process is shortened, and the early strength is improved while setting is promoted; the liquid alkali-freeaccelerator is high in solution stability, high in adaptability to cement, high in compatibility with other concrete admixtures and capable of prolonging the cement setting time and improving the cement setting strength, and the concrete resilience rate is lower. The setting promoting effect to the cement is good, the cement initial setting time is smaller than or equal to 5 minutes, the final setting time is smaller than