The invention discloses a lifting type undisturbed soil triaxial sample preparation device, which belongs to the field of indoor geotechnical testing of civil engineering discipline, and comprises a supporting mechanism, a lifting mechanism, a cutting mechanism, a limiting mechanism and a sample bearing mechanism; the invention adopts a hydraulic lifting table to drive the lifting of a soil sample, and replaces manual cutting by a circular rotatable cutting blade; due to the use of the circular cutting blade, the soil can be directly cut into a cylindrical sample during a cutting process. In this way, according to the soil sample data, the hardness of the soil sample is determined, and different cutting speeds are determined; the soil sample can be raised by the hydraulic lifting platform,and the gradually raised soil sample is cut by the rotation of the cutting blade to complete a preliminary production of a triaxial sample. According to the lifting type undisturbed soil triaxial sample preparation device, the problems that existing sample preparation devices have complicated operation steps in a sample preparation process, are greatly affected by the proficiency of a sample preparation operator, have a low sample preparation efficiency, have a large disturbance to the soil sample during the sample preparation process, have a low success rate of the sample preparation and thelike are solved.