The invention discloses an antique treatment method for the surface of leather. The antique treatment method comprises the following steps: preparing a treatment liquid from 10-25 parts of waterborne polyurethane resin, 1-4 parts of pentanediol, 1-5 parts of thermosetting acrylic resin, and 40-60 parts of ethanol solution with a mass fraction of 85-92%; carrying out a short-time ultrasonic oscillation pre-treatment on the leather at first, then carrying out a primary surface treatment by virtue of the treatment liquid, drying, grinding and colouring, then drawing cracks, then carrying out a secondary surface treatment and drying, and then grinding and polishing. The leather treated by the method disclosed by the invention is good in antique effect, and the interior structure strength of the leather can be enhanced and coating protection is carried out on the surface of the leather during preparation. The method is capable of shortening the antique treatment processing time of the leather, increasing the working efficiency, and achieving a low cost.