The invention provides a two-way locking device with a guide rail for turbine auxiliary installation. According to the two-way locking device, a support and a head clamping board can not be moved in the locking process and the locking quality is guaranteed. The two-way locking device comprises the head clamping board. Clamping openings matched with turbine heads in shape and size are formed in the head clamping board. The two-way locking device further comprises a support, wherein the support and the head clamping board are arranged on a base side by side, the head clamping board is fixed to the base, the middle portion of a body of the support is of an opening structure, transverse supporting boards are evenly distributed in the position of the opening structure, the two sides of each transverse supporting board are tightly fixed to the two sides of the body of the support, clamping opening rows with the number identical to the number of the transverse supporting boards are arranged in the perpendicular direction of the head clamping board, and each clamping opening row is evenly provided with the clamping openings.