Defect repairing method for elastic mat

A defect repairing method for an elastic mat is provided. The defect repairing method for an elastic mat includes steps as follows. A defective elastic mat is provided, a raw material mixing step is performed, a coating step is performed, and a heating step is performed. The defective elastic mat has at least one defect at a surface of the defective elastic mat, and the mentioned defect is a hole, a pore or a crease. The raw material mixing step is to mix an adhesive and a foaming agent to form a mixture. The coating step is to coat the mixture on the surface of the defective elastic mat to form a semi-finished elastic mat. The heating step is to heat the semi-finished elastic mat to a foaming temperature so as to foam the foaming agent in the mixture, and inflate the volume of the mixture to filling up the defect to form an elastic mat. Therefore, the goal of repairing the defect of the elastic mat and maintaining or increasing the thickness of the elastic mat can be achieved.