The invention provides a high voltage DC power source for an insulator artificial pollution test. The high voltage DC power source comprises an AC voltage source, a boosting circuit, a rectification circuit and a filtering circuit, wherein an AC voltage is outputted by the AC voltage source, the boosting circuit is used for converting the AC voltage outputted by the AC voltage source into an AC voltage with a higher voltage grade for output, the rectification circuit is used for the AC voltage outputted by the boosting circuit into a DC voltage which is outputted, and the filtering circuit is used for storing charge capacity, filtering the DC voltage outputted by the rectification circuit and outputting the DC voltage after filtering to an insulator. The high voltage DC power source is advantaged in that utilization efficiency of an AC power source is high, the electrical loop structure is simple, a control system is simple in design, demands of the insulator artificial pollution test for the high voltage DC power source can be satisfied, and equipment cost is substantially reduced.