The invention discloses an intelligent pneumatic landing door system. The intelligent pneumatic landing door system comprises a landing door locking mechanism, a landing door sliding mechanism, an electric control mechanism, a pneumatic landing door self-closing mechanism and a landing door opening protection mechanism, wherein the pneumatic landing door self-closing mechanism comprises an air cylinder and a piston rod which are in axial hole match, the air cylinder is fixedly arranged on a landing door guiding rail rack of the landing door sliding mechanism, the piston rod comprises a big-diameter section and a small-diameter section, and the outer end part of the small-diameter section is in connected linkage with a landing door hanging plate of the landing door sliding mechanism through a connecting member; the landing door opening protection mechanism comprises an upper clamping block and a lower clamping block which are arranged symmetrically and movably, the piston rod penetrates through a gap between the upper clamping block and the lower clamping block, and the big-diameter section of the piston rod is in abutted-contact interference fit with the upper clamping block and the lower clamping block which are in a closed status. The intelligent pneumatic landing door system has the advantages that the accuracy of transmission and locating is higher, the difficulty of electric control is reduced, the stroke is short, and the service life is long; the intelligent pneumatic landing door system has a landing door opening protection function, so that the safety of the operation of operating personnel is guaranteed; meanwhile, the structure is of a non-contact type, so that the noise is lower, and the wear is less; the intelligent pneumatic landing door system has the functions of alarming and lighting.