High-permeability LED display screen unit circuit board and preparation method thereof

The present invention provides a high-permeability LED display screen unit circuit board and a preparation method thereof. The high-permeability LED display screen unit circuit board comprises a long hard circuit board, a long soft circuit board and a plurality of LED lamp beads. The hard circuit board is internally provided with at least two layers of circuits, the first board surface and the second board surface of the hard circuit boards are both provided with a plurality of electrical and non-electrical bonding pads, the electrical bonding pads are electrically connected with the circuit in the hard circuit boards, the soft circuit board covers the third side of the circuit board and welds the first and second board surfaces of the hard circuit boards through the bonding pads, the LED lamp beads are installed at intervals in order on the soft circuit board located at the third side of the hardware circuit board, and all the LED lamp beads are located at the same line. The high-permeability LED display scr