A method for making an insole includes a step (1) for preparing a base, attaching at least two reinforcement layers on a top of the base and a top layer attached on the base and covering the at least two reinforcement layers, the respective peripheries of the reinforcement layers being attached to the base so as to form a combination unit, and a step (2) for pressing and cutting the combination unit to obtain insoles, the reinforcement layer being enclosed between the base and the top layer. The method is suitable for mass production of the insoles. The insole includes a reinforcement layer which is enclosed between the base layer and the top layer.