The invention discloses a pre-stress diagonal draw bar reinforced concrete framework converting layer and relates to a framework converting layer. The pre-stress diagonal draw bar reinforced concreteframework converting layer solves the problems that an existing converting later is not favorable for structure earthquake preventing, a diagonal pressing column attracts a large earthquake force effect, a converting component is large in size, and the using function of a room is affected. A lower framework beam is horizontally arranged at the bottom of a converting layer, and an upper framework beam is horizontally arranged on the top of the converting layer; floor web beams are sequentially arranged between the upper framework beam and the lower framework beam horizontally from top to bottom; foundation columns are arranged on the two sides of the converting layer, and a converted column is arranged between the foundation columns; a pre-stress diagonal draw bar is obliquely arranged on adiagonal joint of a converting layer side span framework; each end of the pre-stress diagonal draw bar is provided with an anchor end connection portion; the lower end of the pre-stress diagonal drawbar is connected to the joint position of the lower framework beam and the converted column in an anchored manner; and the upper end of the pre-stress diagonal draw bar is connected to the joint position of the upper framework beam and one of the foundation columns in an anchored manner. The pre-stress diagonal draw bar reinforced concrete framework converting layer is used for indoor large spaceframework structure converting.