The invention discloses a reactive 
power compensation integrated box of a low-
voltage distribution transformer, which comprises a box body. The box body comprises a switch room and a 
capacitance room which are arranged in parallel, wherein a measurement sampling 
current transformer, a knife fuse switch, a compensation sampling 
current transformer and a leakage comprehensive protection switch device are arranged inside the switch room, and a 
capacitance compensation device and a measurement terminal are arranged inside the 
capacitance room. In addition, the reactive 
power compensation integrated box also comprises a switching 
automatic control unit which is respectively connected with the measurement sampling 
current transformer, the compensation sampling current 
transformer and the capacitance compensation device. By combining the function of overload protection, 
short circuit protection, current leakage protection, phase-failure protection, zero line-failure protection, reactive 
power compensation measurement, low-
voltage separation, a 
watt-hour meter, a load measuring and recording instrument and the like, the invention effectively solves a series of problems encountered in installing a plurality of single-function devices at the low-
voltage side of a bench 
type distribution transformer, and has the advantages of enhancing the safety and reliability of the low-voltage side of the bench 
type distribution transformer and reducing comprehensive cost.