The invention discloses a rigid-elastic mooring deep-sea platform structure. The rigid-elastic mooring deep-sea platform structure comprises a working platform, a buoyancy tank, a supporting mechanismand a linear mooring mechanism; the supporting mechanism is supported between the working platform and the buoyancy tank; a mooring system adopts a pure anchor chain tension-type rigid mooring system; a magnet-spring system connecting device is mounted above an anchor chain to realize a function of converting rigid mooring into elastic mooring under the action of rare super wind and wave; a supporting column is in the form of a solid circular rod; a square steel pipe placed at angle of 45 degrees is used as a tie beam; and a cable is arranged in the inwardly and obliquely crossed form on a platform contour. According to the rigid-elastic mooring deep-sea platform structure, a problem that an existing sea platform is in small-amplitude shaking for a long time is effectively solved; vertical and horizontal effects of sea waves and ocean currents are reduced; a space occupation problem caused by enabling a traditional mooring cable extends outwards to the platform contour is solved so that a platform can keep stable under a sea environment.