Modular circuit board

A modular circuit board, the modular circuit board (10) comprising:

• a first circuit board (1) including a plurality of electronic components, a circuit layout, at least a first signal port (11) and a power port (12) respectively connected to a signal circuit and a power circuit disposed on the first circuit board (1), and at least one first through hole (13) disposed on a surface of the first circuit board (1);
• at least one second circuit board (2) connected to the first circuit board (1), and including a plurality of electronic components, a circuit layout, a signal circuit connected to at least one second signal port (21), and a second through hole (22) disposed on a surface of the second circuit board (2) and corresponding to the first through hole (13);
• at least one connecting post (3) disposed between the first and second circuit boards (1, 2), and one end thereof is fixed to the first through hole (13), and another end thereof is fixed to the second hole (22), such that the first and second circuit boards (1, 2) are detachably coupled;
• and,
• at least one connecting component (4) electrically connected to the first circuit board (1) and the second circuit board (2).