The invention discloses a lignin cyclamine cationic-type asphalt emulsifier and a preparation method and application thereof. The molecular structure general formula of the emulsifier is as shown in the description, wherein R is a methyl group (-CH3) or an ethyl group (-C2H5) or a hydroxyethyl group (-C2H4OH), and LIGNIN represents a lignin molecular chain. The lignin cyclamine cationic-type asphalt emulsifier is prepared from, by mass, 100 parts of lignin, 159-230 parts of water, 19-27 parts of sodium hydroxide, 42-50 parts of N-aminoethylpiperazine, 23-29 parts of acrylic acid, 30-36 parts of formaldehyde (37%), 35-82 parts of tertiary amine with a low carbon number, 42-50 parts of industrial hydrochloric acid (30%) and 31-37 parts of epoxy chloropropane. According to the lignin cyclamine cationic-type asphalt emulsifier, the synthesis raw materials are easy to obtain, the production cost is low, the technology is simple, and high-temperature reacting is not needed; the emulsifier can emulsify different types of asphalt, the prepared emulsified asphalt is fine and uniform, the storage stability is good, and rapid-cracking cationic-type emulsified asphalt can be prepared.