The invention discloses an equal-diameter cylinder type bare concrete structure template system. The equal-diameter cylinder type bare concrete structure template system is an annular template system which is defined by a plurality of universal template units, wherein each universal template unit is formed by four bending arc-shaped steel channels of which the parallel distance is 610 mm, a cylinder wall outer wood template, a cylinder wall inner wood template, a split bolt group and a steel frame tube group, the bending arc-shaped steel channels and the cylinder wall outer wood template are fixed through screws of which the space is 350 mm, and the split bolt group is formed by a split bolt plug butterfly clamp, double nuts, a water stop piece and a threaded rod; the universal template units are connected through bolts and two connecting plates which are welded at the end heads of the bending arc-shaped steel channels; decorative wood bars which are 50 mm in width are fixedly arranged in edge joints between the universal template units and the edges of the templates and are used for removing the edge joints of the templates and dividing joints of outer cylinder wall concrete. According to the equal-diameter cylinder type bare concrete structure template system disclosed by the invention, reinforcement measures are simple, components of the equal-diameter cylinder type bare concrete structure template system can be easily replaced, the construction speed is quickened, and the construction cost is reduced.