The invention discloses a safe and stable station platform post rain shed, which comprises a group of ceilings and a group of support structures, wherein the ceilings are arranged on the support structures; steel posts, rain shed truss cantilever beams, longitudinal beam components, keels and connecting beams are arranged in the support structures; the rain shed truss cantilever beams are arrangedon the steel posts; the longitudinal beam components are longitudinally arranged between the steel posts and are arranged on the rain shed truss cantilever beams in a penetrating way; the keels are arranged at the two ends of the rain shed truss cantilever beams; steel beams are arranged between the two keels and are arranged in the longitudinal beam components in a penetrating way; the two endsof the steel beams are connected with the keels; the connecting beams are arranged on the rain shed truss cantilever beams and the longitudinal beam components; and movement joints are formed betweenthe support structures. The support structures are arranged under the ceilings; through the arrangement of the high-intensity support structures, the installation and use stability and safety of the whole station platform post rain shed are improved; a steel structure building design is used, so that the construction efficiency is improved; through the arrangement of the movement joints, the deformation in the later period use process of the safe and stable station platform post rain shed can be effectively prevented; and the use safety is further improved.