The invention discloses a high-
solid-content aliphatic acrylic 
polyurethane paint and a preparation method thereof. The high-
solid-content aliphatic acrylic 
polyurethane paint comprises a component A, a component B and a component C, wherein the component A is prepared in the following steps: (1) preparing a 20% 
polyamide wax pulp aid; (2) preparing 
grinding color paste from the following components: high-
solid low-
viscosity hydroxy 
acrylic resin, a 
wetting agent, a dispersing agent, triethoxy 
ethyl propionate, 
titanium dioxide, spherical glass beads, 
carbon black, 154L yellow, 
bentonite and dimethylbenzene; (3) paint mixing: adding an 
ultraviolet light absorber, the 20% 
polyamide wax pulp aid, the flatting agent, a defoaming agent and n-
butyl acetate, so as to obtain the component A; the component B is prepared from aliphatic 
isocyanate tripolymer; the component C is prepared by uniformly mixing n-
butyl acetate, PMA and S-100. The high-solid-content aliphatic acrylic 
polyurethane paint is 
environmentally friendly, the energy is saved, and the emission of poisonous and harmful gas is greatly reduced, so that the energy saving and the consumption reduction are achieved; the 
coating period is short, and the efficiency is high; a once coated dry membrane is high in thickness, the 
coating frequency is reduced, the 
coating efficiency is improved, the labor intensity is alleviated, and a film is strong in 
impact resistance.