Firstly, the calculation model of the partially embedded single pile was deduced based on dynamic Winkler model and transfer-matrix formulation in case of multi-layered soils; and then the pile-pile interactionmodel models were constructed by assuming interactions between the receiving pile and the surrounding soil. By discussing the parameters of embedment ratio L1/L2, pile spacing s/d and angle θ, the calculation model and internal forces solving method of the partially embedded pile groups were obtained based on the pile-pile interactions model. The result shows that those factors have remarkable effects on pile-pile interaction factors of partially embedded pile groups, and most of the energy was released by the soil in the shallow soil. Our results indicate that the surface soil plays a major role in the restraint of the pile, and the conclusion can provide some basis for engineering design.