清代考据学以经、史为主要对象。由于考证六经、三代历史的需要，先秦诸子因其时代与大经相近而倍受重视，成为证经、证史的重要他证或旁证。或佐证事实，或校订脱讹，或旁通音训。因此，以子证经是乾嘉考据学中不可忽视的一个重要方法。 Textual research in the Qing Dynasty by the classics, history as the main target. Due to the textual research on the history of the Six Dynasties and the Three Dynasties, the pre-Qin philosophers have drawn much attention because of their similarities with the Dashkyate. Or to corroborate the facts, correct them or correct their mistakes, or bypass audio training. Therefore, the book of proofs is an important method that can not be ignored in the textual research of Qian and Jia.