Second -hand goods trading has become a popular thing in ecollege students' spare time.At present, there are various kinds of information issuing platforms on the market, such as the Net barter, the exchange net, but the content of information issued is less well-directed, the arragement of information is messy, which can't match the students' demand, so that the customer usually has to waste much time on screening out the information they need.The information platform designed for our college students is not yet formed.Therefore, in view of the needs of students, it is feasible and necessary to establish second-hand Commodity Trading Website.