The work aims to work out the bottle washing machine suitable for electromechanical and packaging specialties for the purpose of professional teaching practice, based on a bottle washer used in industry. With high productivity, the bottle washing machine used in industry has complicated technological process and huge structure. By analyzing the basic technological process and structure of large-scaled industrial bottle washing machine, the bottle moving path, installation of bottle in-and-out, important control points and other necessary structures of industrial bottle washing machine for teaching were specifically mastered and the key points to improve the design of bottle washer for teaching based on industrial bottle washing machine were clarified. With highlighted key structures, the improved bottle washing machine was 4100 mm in length and 1800 mm in width with the productivity of 600 bottles per hour, which was applicable for teaching. It is meaningful to improve the design of large-scaled equipment used in productive practices and convert them into those for teaching purpose, as it is a combination of production and teaching practice.