The invention relates to the field of printer ink, in particular to anti-precipitation ink based on printer inkjet stability. The anti-precipitation ink is prepared from the components with parts as ameasuring unit: 30-50 parts of carbon black powder, 20-50 parts of deionized water, 1-2 parts of an anti-precipitation agent, 5-10 parts of a moisturizing agent, 1-3 parts of a PH conditioner, 1-4 parts of a surface active agent, 1-6 parts of a dispersant, 0.5-1 part of a lubricant, 1-5 parts of a thickener, 0.02-0.4 part of a preservative, 0.1-0.3 part of an active dye agent, 0.2-0.5 part of ananti-rust agent, 0.2-0.8 part of a defoamer and 1-3 parts of balsam. A method comprises the following step: S1, screening is conducted, specifically, the carbon black powder in the raw materials is placed into a screen net to be screened. The anti-precipitation ink has the beneficial effects that through the arranged anti-precipitation agent, the anti-precipitation agent has ultra-high pigment diffusivity, wetting performance and lubricity on the ink, thus a pigment in the ink can be durably and evenly distributed under a static or dynamic environment without being precipitated, the multiple common phenomena such as ink gathering, ink dissolving or not-bright color can be easily avoided, the printer inkjet quality is improved, and the service life of a spray head is prolonged.