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Traditional monitoring and forecasting technology is affected by the enlargement of landslide area, which leads to low accuracy of prediction. To solve this problem, the key technology of landslide disaster monitoring and forecasting based on high-precision low-altitude photogrammetry is proposed. According to the environmental factors of landslide geological body, the monitoring and forecasting indexes of landslide hazards are established, and the related parameters of formation pressure variables are calculated according to the indexes. Using high resolution digital remote sensing equipment as sensor, high precision low-altitude photogrammetry technology is used to extract data, in order to analyze landslide accumulation characteristics and compactness. Based on the above characteristics, the correlation function is established to determine the object of monitoring and prediction and the level of monitoring and prediction, so as to complete the monitoring and prediction of landslide disasters. The experimental results show that the prediction accuracy of this technology is high, up to 98.8%. It provides necessary technical support for ensuring people's life safety.