Abstract: At present, landside is becoming more and more serious in my country. It causes great harm to the national economy and the safety of people health. Landside monitoring survey is particularly important to manage the landside. The inclinometer as a kind of precise and efficient technology is widely used on the landside monitoring survey. Through long term monitoring inclinometer of five hole in Shuangda road landslide of Mentougou distract, on the detail basis of the inclinometer principle, it analyses the raw data systematically. Then the article calculates the direction displacement, synthetic displacement, synthetic angle, displacement rate of each point depth. Finally, it summarizes their mutual relations and the change regularity, and confirms the exact depth and the direction of the slide. The monitoring results provide the scientific basis for the latter management of the slide.