Process for refining vinyl acetate crude products

The invention provides a process for refining vinyl acetate crude products comprising the steps of, acid-washing the vinyl acetate crude product with acetic acid though acid-washing towers, rectifying with a first rectifying tower to remove by-product acetic ether, acetic acid and water, discharging from the upper side line gaseous phase of the first rectifying tower, obtaining materials containing rich water, condensing and laminating to discharge the aqueous phase materials, carrying out infinite reflux to the oily phase materials, rectifying with a second rectifying tower to remove by-product methyl acetate and acetic aldehyde, refining the acetic acid with third and fourth rectifying towers, so as to remove the residual trace amount acetic ether.