The utility model relates to an anti-fake seal, which comprises a seal and an inkpad box, and is characterized in that a socket with a color-separation clapboard is arranged on the vacant parts among the writings of the seal, the characters, and the figures. The occlusive sashes opposite to the seals are arranged in the inkpad box. The close inkpads of different colors, which are distinguished difficultly by the eyes, arranged in the sashes. The seals of different colors are affixed on printings, contracts or documents on one's own need. Meanwhile, the same seal is affixed on the other enclosure and registered or archived in authority offices such as a notary office, a guild or the like. If the seals of printings, contracts or documents are identified necessarily, the authority offices are requested to withdraw the archived enclosures, distinguish both the seals by a magnifier, a computer optical instrument or an optic analytical instrument to discern the truth.