Zhou Bida 周必大 (1126-1204) was one of the most eminent scholar-officials in the reign of Emperor Xiaozong 孝宗 (1127-1194, r. 1163-1189) of the Southern Song 宋 dynasty (1126-1279). His official career spanned more than forty years, from the last years of the reign of Emperor Gaozong 高宗 (1107-1187, r. 1127-1162) to the early reign of Emperor Guangzong 光宗 (1147-1200, r. 1190-1194). A great part of his long career was with the Hanlin 翰林 Academy and the Historiography Institute. He was at the time also a companion and tutor to the Emperor and the Princes. Later, he worked in the Department of State Affairs and the Bureau of Military Affairs, and was promoted to the post of Grand Councilor in 1187. His long service at the Court afforded him unusual privy to the court affairs and the most intimate knowledge of government policies. He wrote many essays on politics and drafted numerous imperial edicts concerning the royal court and national policies. During the Kaixi 開禧 (1205-1207) period, his son, Zhou Lun 周綸 (1156-?) began editing his writings, and printed about two-thirds of the manuscripts. The remaining one-third were later printed by Zheng Zijing 鄭子敬 (?-1237). The Collected Works as we know it today consists of two hundred volumes, five appendices and a chronology of his life. It is an important work which allows us insights into the court policies of Southern Song, the relationship between the Song and the Jin 金 (1115-1234), and the details in the compilation of the reign history. There are two extant editions of Zhou's Collected Works. They are: 1. Wenzhong Ji 文忠集, the Siku quanshu 四庫全書 edition. 2. Luling Zhou Yiguo Wenzhonggong Ji 盧陵周益國文忠公集, Yingtang Bieshu 瀛塘別墅 edition, published by Ouyang Qi 歐陽綮, the first part in 1848, and the remaining parts in 1851. This essay provides a brief introduction to the contents of the collection and their significance to the study of Song history.