The invention discloses a digitalized-control low-
voltage direct-current power source 
energy feedback type electronic loading boosting 
system comprising a main circuit and a 
control circuit. The main circuit comprises a Boost module and a DC (
direct current)-DC boosting conversion module which are sequentially connected, the Boost module is connected with a parallel low-
voltage direct-current power source, and the DC-DC boosting conversion module is connected with a grid-connected 
inverter system. The 
control circuit comprises a fault protection circuit module, a current and 
voltage sampling and 
signal processing module, a DSP (
digital signal processor) embedded 
type system module and a high-frequency driving module. The digitalized-control low-voltage direct-current power source 
energy feedback type electronic loading boosting 
system thoroughly solves the problems that 
energy feedback is hard to realize during 
ageing of the low-voltage direct-current power source and a conventional 
static loading is energy-consuming, heating and large in size, and is energy-saving, efficient, environment-friendly, reliable in performance, high in 
automation degree and stable in power source 
ageing quality, and is particularly applicable to reliability test, on-load test and output characteristic test of the low-voltage direct-current power source.