A height adjustment device for turning tool installation comprises a base, a sliding block, a supporting base and an adjusting screw rod, wherein a horizontally arranged sliding cavity with an opening formed in the top is formed in the base, a screw hole matched with the adjusting screw rod is formed in one end wall of the sliding cavity, the sliding block is arranged in the sliding cavity, an adjusting oblique surface is formed on the sliding block, a wedge block matched with the adjusting oblique surface is fixedly arranged on the supporting base, a supporting base lifting guiding and limiting structure is arranged between the supporting base and the base, the adjusting screw rod is connected with the connecting screw hole in a threaded mode, and the inner end of the adjusting screw rod is connected with a corresponding end of the sliding block. When the height adjustment device for turning tool installation is used, the device is placed on a tool rest of a turning lathe to replace a spacer, a turning tool is placed on the top surface of the supporting base of the device, the sliding block is made to reciprocate horizontally in the sliding cavity by rotating the adjusting screw rod, and then the supporting base rises or falls correspondingly to achieve continuous adjustment of the height of the turning tool. The height adjustment device for turning tool installation is simple in structure, convenient to use and high in stiffness of connection between the turning tool and the tool rest.