Touch substrate and touch display device

A touch substrate, comprising:

• a base substrate;
• a plurality of first touch electrodes on the base substrate;
• a plurality of second touch electrodes on a side, facing away from the base substrate, of a layer where the plurality of first touch electrodes are located, wherein the plurality of second touch electrodes are insulated from the plurality of first touch electrodes;
• and
• a plurality of floating electrodes, wherein the plurality of floating electrodes are insulated from the plurality of first touch electrodes and the plurality of second touch electrodes;
• the plurality of floating electrodes are arranged on a same layer as at least one of the plurality of first touch electrodes or the plurality of second touch electrodes;
• and each of the plurality of floating electrodes has a mesh shape, and at least part of the plurality of floating electrodes are disconnected at at least part of dots.