Abstract: Monitoring and theoretical research on cold deep pits were very inadequate in Harbin area, fewer on the foundation pit through the winter season. The statistics and analytical process were conducted on monitoring data of Anbu trade area renovation deep excavation pit in Xiangfang district, Harbin. The results show that:The deformation of support structure in the depth direction was composite, and the space effect was not obvious. Take the 1/2 height of pit depth as dividing line, the horizontal displacement of sun angle was greater than negative angle at the same depth above dividing line; the results was opposite below the dividing line. The Supporting effect of the combination of steel sheet pile and PILES wasn't directly better than only PILES, and the stability of the of soil frost heave effect should be taken into account during excavation process. Generally, this support program was feasible, but there were some damages of PILES,the safety factor should be improved. Some similar projects should improve the safety factor during the support system design. The results provided an important basis for the design and construction of deep foundation in Harbin area.