The invention provides a landslide prediction method and system based on big data analysis, and belongs to the technical field of landslide prediction. The landslide prediction method and system basedon big data analysis comprise the following steps: S1, acquiring information data; S2, establishing a slope analysis model; S3, inputting the information data into a slope analysis model for analysisto obtain prediction data; S4, acquiring monitoring data; S5, if the difference value between the prediction data and the monitoring data is not in the first preset range, modifying the slope analysis model, circularly executing the steps S2-S4, and if the difference value between the prediction data and the monitoring data is in the first preset range, judging whether the difference value between the preset data and the monitoring data is in a second preset range or not; S6, if the difference value between the preset data and the monitoring data is within a second preset range, sending out safety notification information, and if the difference value between the preset data and the monitoring data is not within the second preset range, sending out early warning notification information. The method is high in efficiency and precision.