Based on a study of fluid inclusions in quartz from Xiangfenchang, Laohutou, Niulanling and Jinzhuyuan deposits in Limu orefield of Guangxi, it is observed that primary fluid inclusions in hydrothermal ore-forming minerals are mainly pure liquid phase inclusions and some gas-liquid phase inclusions. On the whole, the fluid inclusions belong to the system of medium-low temperature, low salinity and medium density. And it can be concluded that this ore deposit was formed in a meso-genetic ore-forming environment.