胡瑗是北宋时期以义理解易的先驱，其思想被后人评为“开伊洛之先”。他的易学观集气、象、理三者于一体，重视《周易》书中的变易法则，提出“以正性制情”的人性观。本文从四个方面对胡瑗的易学思想进行分析，并简要评述了其易学观对北宋易学尤其是程氏易学的影响。 Hu Kui was a pioneer who understood Yi during the Northern Song Dynasty. His thinking was later rated as “pioneering the Iloilo”. His theory of easy to learn integrates gas, elephant and reason into one, attaches great importance to the law of change in Book of Changes, and proposes the concept of humanity with “positive emotion”. This article analyzes Hu Xun’s Yi-ology thought from four aspects and briefly comments on the influence of Yi-ology on the Yi-ology of Northern Song Dynasty, especially of Cheng’s Yi-ology.