Abstract: For quantitative analysis of the permafrost stability analysis of subsidence monitoring network, to reduce the construction cost of measuring points, in the northeast region, the actual project data analysis is performed. The results show that during December to February, as the temperature gradually reduced to less than 0 ℃ , frozen soil depth, settlement monitoring points increases gradually, February and march, frozen soil depth to achieve the minimum, monitoring the cumulative settlement up to 1 cm. Temperature has a direct impact on the frozen soil depth, and has a great impact on the formation of frozen soil depth. When the temperature drops, the frozen soil depth deepens and the monitoring point is lifted. With the increase of
temperature, the frozen soil depth decreases, and the monitoring point starts to decline and finally tends to be stable.

Key words: seasonal frozen soil, stability, temperature, frozen soil depth