Non-voltage-drop light bar circuit and light bar

The utility model discloses a voltage-drop-free light bar circuit and a light bar, and relates to the field of LED light bars, the voltage-drop-free light bar circuit comprises a power supply module, the power supply module comprises a power supply positive electrode, a positive electrode wire, a power supply negative electrode, a negative electrode wire and a negative electrode return wire; the positive wire is connected with the positive electrode of the power supply, one end of the negative wire is connected with the negative electrode of the power supply, and the other end of the negative wire is connected with the negative return wire; the light-emitting module comprises a plurality of light-emitting units, the positive electrodes of the light-emitting units are connected with the positive electrode wire, the negative electrodes of the light-emitting units are connected with the negative electrode wire or the negative electrode return wire, and the light-emitting units are sequentially connected in paral