The invention belongs to the field of painting preparation and particularly relates to a bottom-face integrated anticorrosive paint obtained through modification by using the polyaspartic acid ester as the base. The anticorrosive paint is prepared from, by mass, 20-35% of polyaspartic acid ester, 10-18% of modified resin, 0.2-0.8% of a defoaming agent, 0.3-0.5% of a leveling agent, 0.5-1.5% of ultraviolet absorber, 32-42% of pigment, 10-25% of pigment, 5-10% of a solvent, 20-29% of a curing agent and 1-5% of a flatting agent. The paint has the excellent weather resistance, gloss retention, color retention and weather resistance and high solid content, meets the requirement for environmental protection, does not need a primer or intermediate coat, can achieve bottom-face integration, the thickness of the film formed at a time can reach 150-375 micrometers, and the construction cost is lowered.