The invention discloses an aging-resistant and corrosion-resistant SMC sheet molding compound and a molding device thereof. The aging-resistant and corrosion-resistant SMC sheet molding compound comprises following raw materials in parts by weight: 70-120 parts of epoxy vinyl ester resin, 2-4 parts of an antioxidant, 8-12 parts of a flexibilizer, 15-30 parts of a low profile agent, 1-5 parts of athickener, 30-50 parts of 15-25mm alkali-free untwisted glass fibers, 8-12 parts of a release agent, 1-4 parts of a curing agent, 5-10 parts of color paste, 2-2.5 parts of a dispersing agent, and 0.5-1.5 parts of active magnesium oxide. The forming device thereof comprises an upper die and a lower die, a first trapezoidal push block and a second trapezoidal push block are respectively arranged inthe upper die and the lower die, an L-shaped transmission rod is rotatably connected to a die arm, and a cross beam is arranged above an upper push plate. According to the aging-resistant and corrosion-resistant SMC sheet molding compound and the molding device thereof, by adopting the vinyl ester resin, the antioxidant and the flexibilizer, the corrosion resistance and the aging resistance are improved, a cooling device is additionally arranged so that the processing efficiency is improved, and the technology of simultaneous demolding of the upper side and the lower side is adopted so that the defect that a processed product is difficult to take out during single-side demolding is overcome, the push blocks are combined with the ejector rod, and the defect that the processed product is easily damaged by ejection during demolding by the push rod is overcome.