Abstract:Product supplementary services (PSS) are affiliated to product in the direction of Customer Value Proposition In contrast with the R&D in the upper section of the industrial chain, PSS in the lower section of the industrial chain are the same important to the firm in the competitive strategy This paper puts forward a provision mechanism of PSS Under analyzing these characteristics of PSS and customer, all services enjoyed possibly by customer are excavated from the customer active cycle Then these services are screened by the mean of value evaluation and market requirement analysis These selected PPS are provided with a feasible and practicable way for customer’s benefits, in which the winwin result is arrived between the customer and the firm