The invention provides a treatment method for thermosetting resin. The treatment method comprises the following steps: providing the thermosetting resin obtained after thermocuring, wherein the thermosetting resin contains an ester bond, and has a part to be treated; dissolving an ester exchange catalyst in a solvent to obtain an ester exchange catalyst solution; treating the part to be treated with the ester exchange catalyst solution to load the ester exchange catalyst to the part to be treated; and heating the ester exchange catalyst-supported part to be heated to make the part to be treated of the thermosetting resin undergo an ester exchange reaction in order to achieve thermal forming. A removal method for the thermosetting resin comprises the following steps: providing the thermosetting resin obtained after thermocuring, wherein the thermosetting resin contains the ester bond, and has the part to be treated; dissolving the ester exchange catalyst in the solvent to obtain the ester exchange catalyst solution with the ester exchange catalyst concentration being 0.02-0.05 g/ml; and treating the part to be treated with the ester exchange catalyst solution to make the part to betreated dissolved in the ester exchange catalyst solution.