The invention relates to a sprayable solvent-free epoxy coating material formula and a preparation method thereof, and the sprayable solvent-free epoxy coating material is mainly used for protecting steel and iron metal materials such as engineering machinery, bridges, ships, ocean engineering and the like. The sprayable solvent-free epoxy coating material contains low-polymerization-degree biphenol A epoxy resin, low-polymerization-degree biphenol F epoxy resin, fatty acid modified novolac epoxy resin, a polyfunctionality epoxy active diluting agent, a modified alicyclic amine epoxy curing agent, organic-inorganic coloring pigment, inorganic filler, a dispersing agent, a defoaming agent and a leveling agent. According to the production specification of the coating material formula, the volume solid weight of the coating material is more than or equal to 95 percent, when the ambient temperature is more than 12 DEG C, the coating material can be sprayed by utilizing an airless spraying device, the thickness of a dry film formed in one-time spraying can reach 1mm, and the sprayable solvent-free epoxy coating material is particularly suitable for the ultralong anticorrosion environmental construction in ocean engineering, and not only can reduce the emission of organic volatile matters, but also can greatly save the construction expense.