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 winwin result is arrived between the customer and the firm