The invention relates to a spraying construction method of a heavy-duty anticorrosion polymer organic rock material and heavy-duty anticorrosion polymer organic rock. The method comprises the following steps: treating a metal raw material; removing impurities and treating the surface till the roughness is 80-90 microns; spraying the heavy-duty anticorrosion polymer organic rock material; and spraying a coating material in four hours of spraying sand. The heavy-duty anticorrosion coating material is prepared from a component A and a component B, wherein the component A comprises a polyisocyanate prepolymer with -NCO value of 19-23; the component B comprises a polyamine main agent with amine purity of 100%. The construction method of the heavy-duty anticorrosion polymer organic rock material implements the concept of firstly coating and then processing; the coating material is sprayed in workshop and is not influenced by the outdoor environment; the metal raw material is small in area; the coating material is separately sprayed, so that the waste of the coating is avoided, and the pollution to the environment and other devices is avoided; the coating material can be sprayed by using a mechanical arm, so that the property of the coating materials is optimally expressed.