Abstract: The fiber-reinforced polymer (FRP) woven web structure (WWS) is an innovative large-span spatial structure composed of FRP strips. The FRP strips are crossed each other and woven to form a flexible web plane, and then the web is stressed integrally in an outer plane. The WWS is a tensegrity spatial structure system made of flexible members of several mechanical statues. The basic assumptions, the fundamental mechanical model, and the equations of the simple FRP WWS of ring beams and central symmetry FRP strips are studied. The equations are drawn. Based on the equations, three load cases of FRP WWS including integrally pre-stressed in an outer plane, the whole span load and half span load are analyzed in theoretical method. The numerical calculations of a simplified FRP WWS are conducted. The fundamental mechanical model of FRP WWS is established, and the theoretical approach for analyzing FRP WWS is concluded. Those provide the theoretical method for calculating of FRP WWS. Through the parameter analysis, the influence principals of parameters on stiffness of structure in service state are studied, which can be referred for the preliminary design of FRP WWS.