Recent years buried spiral steel plastic composite pipe has been applied to drainpipe construction of many big cities with the development of sewage treatment business in China. As a substitute for traditional concrete drainpipe

it has many merits such as relatively cheap price

convenient in site installation

beneficial to environment

perdurable work life. But as a new type structure

its interaction mechanism with ambient soils still needs investigation because its application period is not long enough. Finite element method is used for numerical analysis of the interaction of buried spiral steel plastic composite pipe with ambient soils. Strength and deformation characters of buried spiral steel plastic composite pipe and ambient soils are obtained theoretically. Corresponding results can be referenced by related engineering practice.