The invention discloses an ardealite curb and a preparation method thereof, belongs to the technical field of ardealite curb processing, and aims to solve the problems of long production cycle, large use amount of a gel material, low compressive strength and high cost of the existing curb. The ardealite road tooth is prepared from the following components in parts by weight: 350 to 550 parts of modified ardealite, 156 to 244 parts of stone, 233 to 367 parts of aggregate, 24 to 38 parts of ash residue, 4 to 6 parts of polyvinyl alcohol, 0.8 to 1.2 parts of calcium formate, 1.6 to 2.4 parts of hydroxypropyl methyl cellulose and 8.6 to 13.5 parts of accelerator, the components are uniformly mixed and stirred, then water is added for stirring, a semi-dry mixture obtained by stirring is filled into a mold, the mold is punched and formed after vibration, and demolding and natural curing are performed after forming. The use of a gelling agent is reduced, the production cost is reduced, the production period is shortened, and the economic benefits of enterprises are greatly improved.