Tooth root patch mold, manufacturing method thereof and strain gauge mounting method

The invention belongs to the technical field of research, development and testing of aero-engines, and particularly relates to a tooth root patch mold, a manufacturing method of the tooth root patch mold and a strain gauge installation method. After the small-size strain gauge is removed, the formed concave small cavity at the bottom of the tooth root patch mold has the effect of fixing the small-size strain gauge, the strain gauge can be accurately positioned, the thickness after bonding can be well controlled, it can be guaranteed that the position of the strain gauge and the final thickness are kept consistent in the multiple bonding processes, and the bonding quality is improved. The problems of failure and the like caused by non-uniform and super-thick adhesive layers when the strain gauge is pressurized can be solved. The tooth root patch mold adopts a layer-by-layer curing forming process from outside to inside, the problems of mold corner stress concentration, size reduction and the like caused by vol