The invention discloses a soil solidification material and a method for applying the material to a heavy-load soft soil foundation. The method comprises the following steps: preparing materials including EN-1 curing agent, cement, macadam, lime and clay collected on site; sun-drying and pulverizing the clay collected on site; mixing and stirring the materials at the given ratio to obtain a material mixture; paving on site and rolling; spraying with water and curing for 7 days; and paving another mixture until the previous layer meets the strength requirements. The inventive soil solidification material can greatly improve the performance of the existing solidification materials such as lime, cement and coal ash. The soil is cured on site by the soil solidification material as road base or treatment layer, which solves the problems of the conventional solidification material as road base or treatment layer, such as low strength and poor water resistance, ensures the road base and road surface of road and city road to meet the requirements for underground and surface water, and improves the strength and water resistance of road base and foundation layer.