To　express　the　complex　form　of　product　configuration　knowledge,　this　paper　proposes　an　extended　weight　constraint　logic　programming　language,　which　is　based　on　the　weight　constraint　logic　program,　extending　the　head　of　the　rule　to　the　form　of　disjunctive　constrain,　and　its　stable　model　semanteme　is　also　obtained.　The　new　logic　program　has　more　powerful　expressiveness　and　reasoning　ability;　however,　it　does　not　increase　the　computational　complexity.　Finally,　an　example　of　computer　configuration　is　used　to　discuss　the　extended　weight　constraint　logic　programm　in　the　application　of　product　configuration.