PROBLEM TO BE SOLVED: To provide a granulation solidification method of liquid mud, which dispenses with an expensive coagulant and water-absorbing material, and enables a granulated article to be efficiently produced in a short period of time using a solidification material.SOLUTION: The granulation solidification method of liquid mud comprises: a solidification material addition step of adding a hydraulic-setting solidification material to the liquid mud and mixing them; a curing step of curing the liquid mud after the solidification material addition step until it becomes in a semisolid state; and a loosening granulation step of loosening treated mass of the liquid mud in the semisolid state after the curing step and granulating the loosened mass of the liquid mud.
