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The earth-finishing-material production method according to the present invention comprises the steps of : collecting earth and sorting same according to colour; selecting and crushing one of the earths that has been sorted according colour; eliminating sand and gravel comprised in the crushed earth; immersing the earth, from which sand and gravel have been eliminated, in water and eliminating floating matter floating on the water; dying the earth, from which floating matter has been eliminated, by means of a natural dye; producing an earth paste by mixing water, a natural adhesive, a coating solution and an additive into the dyed earth; drying the earth paste; forming an earth powder by crushing the dried earth paste; and sifting out earth powder of fine particles. According to the present invention, even though construction with the earth-finishing material is straightforward, it is nevertheless possible to easily economise on costs and substantially improve durability and to improve the expiry date.