中文摘要：

钾长石巨晶在花岗岩中较为常见，对花岗岩的成因具有重要指示意义。本文介绍了花岗岩中钾长石巨晶的最新研究进展，重点梳理了钾长石巨晶的一些典型地质特征，讨论了钾长石巨晶的形成机制，详细介绍了关于钾长石巨晶原位地球化学研究的最新进展，提出了存在的问题及未来可能的一些研究方向。

英文摘要：

K-feldspar megacryst is common in granite, and plays an important role in the study of the genesis of granite. This article summarizes the update research progress on K-feldspar megacryst, including the typical geological characteris- tics, the formation mechanism of K-feldspar megacryst, and the latest progress of in situ geochemistry research. This arti- cle also points out the existing problems and certain future important research fields.