A low-voltage DC distribution board for indoor LED lighting with multiple LED lamps, comprises: a power converting module (2), arranged within a box casing (7) and connected with a power input port (1), the power converting module (2) including a set of output ports (3) with different output voltages; a set of selection switches (4) connected between the set of output ports of the power converting module (2) and a plurality of current regulators (5) which are connected to load connectors (6).