The invention provides a low-voltage power distribution box, belongs to the technical field of a power distribution box, and particularly relates to the low-voltage power distribution box. The invention provides the low-voltage power distribution box capable of being conveniently installed. The low-voltage power distribution box comprises an outdoor box body, wherein a load switch is arranged in the outdoor box body; the wire outlet end of the load switch is respectively connected with the wire inlet end of a circuit breaker and a reactive power compensation module through buses; and each current transformer is respectively arranged on the corresponding bus in a sleeving way. The low-voltage power distribution box is characterized in that the reactive power compensation module comprises anupper installing transverse plate and a lower installing transverse plate; a capacitor is arranged at one side of the upper installing transverse plate; a capacitor is respectively arranged at each of two sides of the lower installing transverse plate; a composite switch installing vertical plate is arranged in front of the capacitor; a branch wire inlet circuit breaker is arranged at the front upper part of the composite switch installing vertical plate; a composite switch is arranged at the front lower part of the composite switch installing vertical plate; a connecting transverse plate isarranged in the back middle part of the branch wire inlet circuit breaker; and transverse strip-shaped holes are formed in parts, exposed out of the two sides of the branch wire inlet circuit breaker,of two sides of the connecting transverse plate.