This paper analyzes the influences of multi_consumer_types on the product differentiation under the condition of separated or connected consumer market. It forms the demand functions of differentiated_products of the enterprises facing multi_consumer_types,reviews the affection of differentiated products combination on the cost function with the conept of scopeeconomy. All after these,the paper points out the critical condition to Shoose the production mode of one product or multi_products_combination,and forms a theoretic equilibrium model to determine the product quality index,quantity and price of the differentiated_products of the enterprises under the condition of consumer differentiation.