Abstract: The practices show the constructional methods of turning arch have special superiorities in some conditions, which are similar to that of the first turning constructional arch in our country. Directing to the shortages that are in large numbers, of masonry for balance weight and absorbing the advantage of the design suggested by B. Д. Baсильев, the meditation of arch bridge in flying bird balance by itself in respect to the turning construction and primary design are presented. In addition, the comparisons of several turning consttuctional methods are given.