The invention discloses a low-disturbance hole forming method for a model test. The low-disturbance hole forming method adopts the following steps: (1) model soil is initially solidified, specifically, (1.1) a drain board is arranged on the lower part of a model box, simulation assemblies are assembled, the outer surfaces of the simulation assemblies are coated with silicone grease or Vaseline, each simulation assembly comprises a model pile, a hole forming pipe and a pipe cap which are sequentially connected from bottom to top, then the lower ends of the model piles on the lower parts of thesimulation assemblies are vertically inserted into pile penetrating holes of the drain board, (1.2) mud is poured into the model box, and (1.3) a loading board is adopted for graded loading to form the initially solidified model soil; and (2) hole forming is conducted under the Ng condition, the model box is placed in a hanging basket of a centrifuge, the centrifuge is started, the acceleration isincreased to the set value till the strength index of the model soil reaches the set threshold value, and the pipe caps and the hole forming pipes are sequentially pulled out to form empty pile holes. The hole forming quality is good, and disturbance to the model soil is small.