For the design of smart home appliances in mass customization mode, the work aims to analyze the problems in three ways of user participation in customization during the process of purchasing and using smart home appliances, including scene customization, module customization and suite customization and then excavate the customization needs of users for smart home appliances, and put forward the design strategy of user participation in smart home appliance customization. Through literature research and case analysis, the design case of home appliance in mass customization was introduced. For the traditional and smart home appliances customized under the participation of users, the design trends and challenges of users participating in the process of smart home appliance customization at the purchasing and using stage were summarized for enterprises from three aspects of scene customization, module customization and suite customization. Aiming at the process of user participating in smart home appliance customization, three design strategies are put forward for relevant enterprises, including user research of scene customization, combined design of soft and hard home appliance and consistent experience of suite home appliance.