In the history of the western world,jurisprudence developed along two trails: one followed by the templar jurists and the other by the professional jurists.Jurisprudence of templar jurists uses a set of legal language created by templar jurists and explanation methods coming from their experience to fulfill problem solution of law reality,so as to seek knowledge accumulation of practice and technique.The study of legal document writing complies with the need of this jurisprudence development.Legal document science was once reduced to a branch of the general writing course and has now returned to the jurisprudence hall.Legal document science is one of the main courses of jurisprudence and one of the judicial techniques defined by procedural law.The purpose of our study of the return of legal document science is to emphasize and strengthen its theoretic study,to hold the tendency and direction of jurisprudence development,to reform and consummate judicial practice,and to reconstruct the theoretic vitality of jurisprudence.