Ultra-low orbit microsatellite electronic equipment circuit module plugging unit and combination method

The invention discloses an ultra-low orbit microsatellite electronic equipment circuit module plug-in unit and a combination method. The circuit module plug-in unit comprises a substrate, a connector arranged on the substrate and a flexible flat cable connector. The plurality of double-row structure connectors are arranged on two opposite sides of the substrate, the connector on one side is used for transmitting bus signals in the circuit module plugging unit to the outside, and the connector on the other side is used for transmitting low-speed non-bus signals in the circuit module plugging unit to the outside. And the flexible flat cable connector is arranged on the third side edge of the substrate and is used for transmitting high-speed non-bus signals in the circuit module plugging unit to the outside. Only one circuit module is needed, a bus channel, a high-speed non-bus signal channel, a control channel and a signal channel are integrated, the size of an electronic module is reduced, and space is effecti