The invention provides a construction waste treatment system. The construction waste treatment system comprises a coarse sand system, a fine sand system, a mud system and a water circulation system; the coarse sand system is connected with the fine sand system, the fine sand system is connected with the mud system, and the water circulation system supplies water to the coarse sand system, the finesand system and the mud system correspondingly; and construction waste is fed into the coarse sand system, slurry generated in the process of producing coarse sand enters the fine sand system, slurrygenerated in the process of producing fine sand by the fine sand system enters the mud processing system, and water generated in the process of producing mud cakes by the mud processing system entersthe water circulation system. According to the construction waste treatment system, the coarse sand system, the fine sand system, the mud system and the water circulation system are arranged, all thesystems are organically combined so that coarse sand, the fine sand and the mud can be obtained by separation, and cyclic utilization of the water can be realized, the construction waste is effectively recycled, the water resources can also be saved, the energy is saved, the environment is protected.