Based on the standard of MOST theory and the manufacturing process of coating,the standard of man-machine operation working hours was established.by referencing the theory of the man-machine working hours standard.According to the introduction process of new model,the time design software was developed and the time design system of new model was constructed.In the engineering design of new models,using the working hour design software,by reviewing the model drawings,sorting out the operation patterns of the new model,assigning the operation content,setting the operation steps quickly and accurately get the working hours of the key,and completing the setting of the new model.