The invention belongs to the technical field of antennas in stress detection and communication technologies, and discloses a stress antenna, a preparation method and application. A planar spiral antenna is arranged, and the planar spiral antenna is printed on a substrate. The preparation method comprises the following steps of: 1, cleaning the surface of the substrate with anhydrous alcohol, 2, carrying out surface treatment on the substrate, and 3, printing a planar spiral antenna on the substrate by adopting a printing technology, and drying and sintering for 20 minutes at the temperature of60 DEG C. Due to the unique electrical performance of the planar spiral antenna on the substrate, the antenna has high sensitivity to micro-stress, the micro-stress change can be monitored in a wireless communication mode, and the defects that traditional micro-stress monitoring equipment is large in size, large in gravity and the like are overcome. The stress antenna has the characteristics of low cost, stable electrical characteristics, miniaturization, lightness, thinness and low energy consumption, and can be used for passively, accurately, continuously and continuously monitoring the micro-stress change of a measured object in real time.