Hailuogou Glacier， located on the southeast edge of Tibetan Plateau， is a typical monsoonal maritime glacier， which is extremely sensitive to climate change. It is of great practical significance to recognize the present situation and changing trend of glaciers. In this paper， Landsat series remote sensing images are used as data sources， based on remote sensing and geographic information technology， band ratio threshold method and visual interpretation method are used to extract the glacier boundaries of five periods in 1974， 1991， 2000， 2009 and 2020. Combined with digital elevation data， the variation characteristics of glacier length， total area，coverage of debris and glacier cover units in different directions in Hailuogou in recent 46 years are analyzed. The results showed that： （1） From 1974 to 2020， the glacier length shortened by 1 087.10 m， and the average annual retreat rate was 0.15%， among which the retreat rate at the end of the glacier accelerated continuously after 2000. （2） From 1974 to 2020， the area of glaciers in the study area decreased by 0.55 km²， with the area change rate of -0.52% and the annual average retreat rate of 0.03%， among which from 2000 to 2009， the largest decrease was about 0.23 km²， the area change rate of -0.93% and the annual average retreat rate of 0.10%. （3） Glaciers in different directions are also shrinking in different degrees， and the area of glaciers in the east direction is shrinking fastest. The distribution of glaciers is characterized by more in the east and less in the south and less in the north， and there is a positive correlation between the area distribution of glaciers in each orientation and the total shrinkage of corresponding orientation areas from 1974 to 2020. （4） Through comparative analysis， it is found that the debris in the northwest， northeast and southwest of Hailuogou Glacier increases after 2000 and further increases after 2009. It is predicted that the debris cover of Hailuogou Glacier will continue to expand in the future.