With the expansion of human activities and changes in the natural environment, slope geological disasters occur frequently, posing a serious threat to people's lives and property safety. Risk assessment plays a key role in the management and control of geological disasters. This paper takes Tianhe District of Guangzhou City as an example, aiming to combine on-site investigation and mapping with indoor statistical analysis to explore the risk assessment methods of slope geological disasters, in order to improve the ability of disaster prevention and reduction. The results show that the full-process system of susceptibility - danger - vulnerability - risk assessment is scientific and reliable. This paper not only provides a new perspective and method for the risk assessment of slope geological disasters, but also offers a scientific basis for disaster management and decision support.