The invention belongs to the technical field of waterproof materials for buildings, and in particular discloses a reaction type macromolecular self-adhering waterproof coiled material and a preparation method thereof. The invention comprises the main technical schemes that the waterproof coiled material consists of a surface waterproof layer, an intermediate macromolecular self-adhering layer and a bottom isolating layer, wherein the surface waterproof layer serves as a low-density polyethylene waterproof plate or an EVA plate; the intermediate layer serves as a macromolecular self-adhering layer; the chemical crosslinking reaction on an active group and concrete is carried out, and spatial three-dimensional cross-linked network is formed by the active group and a concrete interface, thereby greatly increasing the water channeling property and the durability of the waterproof coiled material are greatly increased; the bottom of the waterproof coiled material serves as a PET isolating film coated with silicon oil; therefore, the service life of the waterproof coiled material is as long as the service life of the building.