In this paper, we summarize the characteristics of the typical underground fluid anomalies associated with the Sheyang M_S4.4 earthquake that occurred on Oct. 20, 2016, and discuss the precursor mechanisms. Our analysis results show that the underground fluid anomalies prior to the earthquake can be divided into medium-and short-term anomalies. The medium-term anomalies are distributed within a 300-km radius of the epicenter and initially migrated from the epicenter to the outer area and then near to the epicenter. Compared to the medium-term anomalies, the short-term anomalies are located much closer to the epicenter, being distributed within 100-200 km of the epicenter and migrate close to the epicenter. The spatial properties and distribution characteristics of the anomalies show that the change in the water-temperature anomalies, which occurred prior to the Sheyang earthquake, may be caused by regional stress variations.