The utility model provides a noise reduction structure of a building construction platform, which comprises a construction platform, a platform base, a buffer shock absorption layer and a noise reduction bottom layer, the platform base is arranged on the noise reduction bottom layer, the buffer shock absorption layer is arranged on the platform base, and the construction platform is arranged on the buffer shock absorption layer. Preferably, the noise reduction bottom layer comprises a sound transmission guide plate, an annular sound insulation baffle, an annular noise reduction damping layer,a sound insulation material layer and a gypsum board. The buffering and damping layer comprises a vibration conduction plate, an annular isolation baffle, a fixed connecting plate, a damping materiallayer and a plurality of stand columns. The noise reduction structure of the building construction platform further comprises an annular installation protruding plate, an annular fixing frame strip, an annular expansion outer frame, a communication air channel and an air inlet hole. The noise reduction structure of the building construction platform can remarkably reduce noise and reduce influences on normal life of surrounding residents, and is ingenious in design, simple in structure, easy and convenient to manufacture, low in cost and suitable for large-scale application and popularization.