A three-point lens replacement assembly for eyeglasses is provided. An inner side of a lens is mounted into an insertion recess of a bridge. A connection hole which corresponds to a connection pin of the bridge is mounted on an upper edge of the lens while the inner side of the lens is provided with a positioning recess and a mounting slot respectively corresponding to and able to be connected with a positioning protrusion and a mounting block of the insertion recess. A temple pivot member for pivotally connected with a temple is fixed and connected with an outer side of the upper edge of the lens. Thereby the lens and the bridge are connected firmly in a three-point positioning manner. No tools are required and operation is easier and convenient during assembly and replacement of the lens. The assembly process is completed faster.