The invention provides an auxiliary installation structure for locking turbines. No matter whether shafts of the turbines to be locked are long or not, the auxiliary installation structure is suitable for the turbines. The auxiliary installation structure is good in university and comprises a head clamping board. Clamping openings matched with turbine heads in shape and size are formed in the head clamping board. The bottom of the head clamping board is supported by the upper surface of a base. The auxiliary installation structure for locking the turbines is characterized in that an air cylinder base of an air cylinder is installed on a transverse guide rail on the upper surface of the base, an air cylinder arm of the air cylinder is tightly fixed to the bottom face of a supporting block, the air cylinder moves perpendicularly, the turbine heads of the turbines to be locked are clamped to the corresponding clamping openings, the middle shaft end of each turbine to be locked is supported by the supporting block, the end to be locked of each turbine to be locked is exposed out of the supporting block, the bottom of the head clamping board is clamped to a longitudinal linear rail of the base, and the longitudinal linear rail is perpendicular to the vertical face of the head clamping board and protrudes out of the upper surface of the base.