It is a kind of high-tech functional composite material which mainly absorbs electromagnetic waves and has little reflection, scattering and transmission. Its principle is to add electromagnetic loss substance into polymer medium. When electromagnetic waves enter the interior of absorbing materials, ions and electrons in the molecules of the materials are pushed to move or jump between energy levels, resulting in conductivity loss, high-frequency dielectric loss and hysteresis loss, which makes electromagnetic energy be converted into heat energy and dispersed into space to disappear, thus generating absorption. It will not cause secondary pollution due to reflection, and its main characteristics are: thin thickness, good flexibility, high strength, high absorption rate, aging resistance (carrier is silicone rubber), stability (-50- 180℃) and low frequency characteristics (10 MHz- 10 GHz). Widely used in electromagnetic compatibility, electronic equipment, high-frequency equipment, shielding boxes, RF shielding boxes, shielding cabinets, test fixtures, microwave darkrooms, absorption shielding in industrial microwave energy equipment to prevent microwave leakage, anti-interference and radiation protection of high-frequency electronic and electrical equipment such as communication and navigation systems. Suppress electromagnetic interference, improve antenna pattern and improve radar direction finding and ranging accuracy; Prevent electromagnetic interference, electromagnetic wave radiation and waveform shaping of microwave devices and equipment; Microwave darkroom, electromagnetic compatibility room, absorption load, attenuator, radar wave RCS reduction, etc.