The invention discloses a fumaropimaric acid modified acrylamide compound, a preparation method thereof and a polymer prepared by the fumaropimaric acid modified acrylamide compound. A structural formula of the fumaropimaric acid modified acrylamide compound is shown in the description. As the fumaropimaric acid modified acrylamide compound is synthesized by taking fumaropimaric acid, a by-product of rosin which is a natural biomass resource, as a raw material, and then the fumaropimaric acid modified acrylamide polymer is obtained through polymerization of the fumaropimaric acid modified acrylamide compound, a synthesis step and a reaction device are simple, the operation is convenient, and the problems of poor heat resistance, difficulty in separation, slow reaction speed, low recycling use performance and the like and the technical problems of environment protection and safety are all solved due to excellent heat resistance, excellent adsorption performance to heavy metals and capability of being repeatedly used for multiple times of the obtained polymer.