The conductor of the pico coaxial cable is composed of tinned wires, the insulation is made of fluoroplastic and foamed polyethylene, and the environmental protection sheath is made of low smoke and halogen-free materials. The cable has the characteristics of small size, high temperature resistance, high flame retardancy, harmless and low attenuation, and can be used in high-frequency digital transmission equipment, switching equipment, wired wireless access network and