民國以來，偽經之說仍不勝數，劉正浩先生專致考辨，以為《左傳》正本清源。為具體瞭解與彰顯劉先生研究《左傳》的成果，本文就其師承與論著，以文獻探討方式，進行相關評介。首先簡述清儒《左傳》學概況，並見前賢疑義探討，以見其源流與憑藉的基礎；繼而，分別就劉正浩《左傳》學研究之動機、師承，及其承繼的研究與方法進行說明，同時析其相關論述之要義，以見其《左傳》學之成就。此中，劉正浩對於《左傳》之主題範圍與考辨過程，雖不出前人基調，但其為《左傳》辨偽，在糾謬正誤上，進一步加深及完善《左傳》學術部分體系，完成一定的研究成果，洵有助於未來之研究與流長

On the ＂Zuo Zhuan＂ of this ancient classics was not forged. Before that there were many scholars have researched. Since the establishment of the National Government, Mr. Liu Zhenghao lives with this problem a long time studying in the Zuo Zhuan. This article first describes Mr Liu Zhenghao about Zuo Zhuan in methods of research is the successor of the previous era of scholars. The Second, it analysis studies of Liu Zhenghao's the results of research on the Zuo Zhuan. Next, it illustrates the value of Mr. Liu Zhenghao's results of research. This discussion is expected to benefit the development of Zuo Zhuan learning