The present invention discloses a robot obstacle avoidance method. The method employs a method of combination of a fixed route and obstacle avoidance processing and respective processing of a fixed barrier and a non-fixed barrier, and is accurate in positioning, low in cost and high in flexibility. The method comprises the steps of: allowing a robot to move along a fixed route and perform obstacleavoidance motion for a non-fixed barrier on the fixed route, wherein the fixed route is a preset motion route of the robot in a condition without a barrier; and allowing the robot to return the fixedroute after completing the obstacle avoidance motion. The present invention further discloses a robot for restaurants or storage logistics by employing the method provided by the invention.