The utility model discloses a treatment device for fine-particle slurry. A slurry outlet of the slurry shield machine is connected with an input port of the separator through a pipeline; one output port of the separator is connected with the slag bin through a pipeline; the other output port of the separator is connected with the sedimentation tank through a pipeline; the sedimentation tank is connected with the treatment tank through a pipeline; the treatment tank is connected with an input port of the slurry pump; an output port of the slurry pump is connected with an input port of the fineparticle separator through a pipeline; one output port of the fine particle separator is connected with the slag bin through a pipeline; the other output port of the fine particle separator is connected with a clean water tank through a pipeline; a manual valve is connected to a pipeline of the clean water tank and the adjusting tank; the slurry shield tunneling machine is simple in structure andreasonable in configuration, rapid tunneling of the slurry shield tunneling machine in a fine-particle stratum can be achieved, the requirement for re-matching of the adjusting pool can be met throughlarge-capacity storage of the clean water pool, and the control index of fine-particle slurry is made to be within the reasonable range.