Operator programming language is an efficient，useful and practical，high—level，new programming language with sound theoretical foundation．How to compile this language is an important problem which should be made researches on．The translation ot programs from procedure language into machine language has been solved，hence the linchpin upon which the translation depends is the transformation of operator programs to procedures．In this paper．the transformation semantics of operator language to while pro-grams was given with model match method．A basic set of transformation rules was given and it was proved to be complete and consistent，so that the theoretic and technologic foundation to translate operator language to procedure language was provided．