Classification according to working frequency:
High frequency connectors, high frequency coaxial connectors, video connectors, coaxial converters, impedance converters, mating size converters, gender converters, microstrip to coaxial converters, waveguide to coaxial converters, matching Load connectors, low frequency connectors, printed board connectors, ribbon cable connectors, integrated circuit connectors, mixed connectors, etc.

Classified according to environmental conditions:
Sealed connectors; high water pressure sealed connectors; high vacuum sealed connectors; three-proof connectors; radiation-resistant connectors; high-temperature connectors; low-temperature connectors.

Classification according to appearance:
Circular connectors are mostly used in military equipment; (the main connection forms include bayonet (quick), thread, automatic locking, push-pull, direct plug-in and pull-out, etc.) Rectangular connectors have a wide range of uses and are developing rapidly. Many board-level connectors are It is a rectangular connector. (There are generally two ways of connecting plugs and sockets: direct plug and pull out and thread locking.)