Abstract: Disclosed is a PCB arrangement and wiring structure of LED lamp beads, including a carrier board, and a VDD pin, a DIN pin, and a VSS pin are further arranged in the LED lamp bead installation area; similar pins are connected and wired in parallel with each other, and all the VSS pins are connected and wired in parallel with each other, so that the voltage between each set of lamp beads remains consistent; all the DIN pins are connected and wired in parallel with each other; and the carrier board is further provided with at least one set of VDD power input pin terminals, VSS power input pin terminals, and DIN control terminals, a plurality of the VDD pins are electrically connected to the VDD power input pin terminal, and a plurality of the VSS pins are electrically connected to the VDD power input pin terminal.