Insertion connection interface of main circuit board

The utility model relates to an insertion connection interface of a main circuit board, which can comprise a power supply input switch unit and a first main circuit board interface or a plurality of first main circuit board interfaces, wherein the insertion interface of the main circuit board can comprise a power supply input circuit, a third assembly detection circuit and a third main circuit board interface, or can comprise a power supply input circuit, a fourth assembly detection circuit and an insertion connection interface of a fourth main circuit board interface, an insertion connection interface of an assembly comprises a second test signal input lead pin and a second test signal output lead pin which are mutually and electrically connected, and the insertion connection interface of the assembly comprises a grounded second test signal lead pin. The insertion connection interface of the main board circuit and the insertion connection interface of the assembly provided by the utility model works together to ensure the normal insertion connection of the assembly, in addition, the power can be supplied to the assembly after the normal insertion connection, and the safety of a system can be ensured.