A touch substrate and a display device are provided. The touch substrate includes a touch structure layer arranged on a base. The touch structure layer includes a plurality of first touch electrodes and a plurality of second touch electrodes; the touch structure layer includes a metal mesh; the metal mesh includes a plurality of mesh patterns; each mesh pattern is a polygon composed of a plurality of metal lines; the plurality of mesh patterns are provided with a plurality of first notches and a plurality of second notches; the plurality of first notches are located at boundary positions of the first touch electrodes and the second touch electrodes; the plurality of second notches are located at other positions except for the boundary positions; each first notch enables the corresponding metal line to form first broken lines, and each second notch enables the corresponding metal line to form second broken lines; in each of the plurality of mesh patterns, the first broken lines and the metal lines adjacent to the first broken lines form a first broken line unit, and the second broken lines and the metal lines adjacent to the second broken lines form a second broken line unit; and a form of the first broken line unit is different from a form of the second broken line unit.