The invention provides a static blasting demolition method for interior reinforced concrete supports and belongs to the technical field of architectural engineering. The construction process of the method comprises the following steps: construction preparation, setting up of an operation platform, watering wetting of interior support beams, breaking of surface bar protection layers of the interior support beams, cutting of dense longitudinal bars and stirrups on the surfaces of the interior support beams, surveying setting-out, beam surface drilling, hole cleaning, agent filling and static blasting, breaking, bar cutting, residue lifting, upper support construction, demolition of all horizontal interior support beams and demolition of upright pillars. According to the method, the construction is simpler than conventional millisecond blasting, complex construction procedures are saved, and the method has high safety and is more environment-friendly; the method is not limited by site conditions and has the effects of high construction speed, low construction noise and little flying dust; and the method ensures that after the interior supports in a reinforced concrete structure are statically blasted, the concrete structure becomes loose and is convenient to demolish, clear and transport.