The invention discloses a muck remover of a TBM main belt conveyer, which comprises a hollow TBM main girder and the main belt conveyer arranged in the TBM main girder, and a second belt conveyer is arranged under the main belt conveyer. Compared with the prior art, the muck remover of the TBM main belt conveyer, which is provided by the invention, can effectively remove much dropping from the main belt conveyer in the girder section, greatly increase the working efficiency of a tunnel boring machine (TBM), shorten the construction period and reduce manpower, the structure of the muck remover of the TBM main belt conveyer is simple, and the number of components is less.