Abstract：The technique of double-row anti-slide piles has been applied in landslide control works nowadays. In practical engineering，some hypotheses are adopted for design. However，the thrust-distribution in double-row piles needs more attention and urgent studies. The structural and mechanical properties of double-row piles are studied. The double-row piles structure can be regarded as rigid frame bearing horizontal pressure. This calculation model takes the back soil of back pile as the research object. The Force method of structural mechanics is employed to calculate the rigid frame. By mechanical analysis，the relevant formula is deduced. Two types of slide thrust have been discussed respectively. A case study in Hongshibao Landslide which lies in the Badong area in the Three Gorges Reservoir is presented finally，the result of which is in agreement with theory analysis.
