The invention relates to the technical field of power equipment reliability evaluation technology and more particularly to a DC integrated test platform, which comprises a first upper computer, a second upper computer, an integrated testing module, an insulation checking module, a grounding parameter checking module, a data communication interface and a power supply module. The first upper computer is used for controlling the integrated testing module, the insulation checking module and the grounding parameter checking module via the grounding parameter checking module and conducting the analysis treatment on acquired and returned data. The integrated testing module is used for testing input and output voltage and current, acquiring ripple factors, conducting the analysis treatment and uploading data to the first upper computer. According to the technical scheme of the invention, the modules can be integrated together to run or separately operated. By means of the test platform, grounding fault points can be quickly found out by utilizing the grounding fault leakage current, without the need of powering off a line, wiring or disassembling wires in the charged operating state of the line. Therefore, the down-time of the equipment of automation and electrification systems is greatly reduced, so that great economic benefits and social benefits are generated.