The invention discloses a sand solidification agent, a preparation method and application thereof. Specifically, the preparation method of the sand solidification agent comprises the steps of: subjecting polymeric alcohol, a diluent, water and a catalyst to first contact to obtain a prepolymer, and then subjecting the prepolymer and an isocyanate compound to second contact. The sand solidification agent, the preparation method and application thereof provided by the invention solve the defects in existing sand solidification agents. And the chemical sand solidification agent provided by the invention has the advantages of simple preparation method, good product fluidity, high consolidation strength, good caking property, strong wind resistance, high temperature resistance and adjustable consolidation time sand fixing agent.