The invention discloses a doped nano pigment YAl 1‑ x m x o 3 The preparation method of (M=Fe, Co, Cu) comprises the following steps: 1) at normal temperature, get deionized water and stir on a magnetic stirrer, according to the molar ratio of Y, Al, and Fe, appropriate ferric nitrate, nitric acid Aluminum and yttrium nitrate are completely dissolved in deionized water successively, and after the above raw materials are completely dissolved, succinic acid is added as a stabilizer to obtain solution A; pH value, to obtain solution B, and then add 1,2-propylene glycol to solution B to obtain a mixed solution; 3) Stir the mixed solution obtained in step 2) on a 60°C constant temperature magnetic stirrer for 2h until the solution becomes condensed glue, then dried, ground, and calcined to obtain solid powder. The preparation method of the invention is green and pollution-free, and the obtained product has the advantages of good dispersibility, low energy consumption, uniform particles, environmental friendliness, low synthesis temperature, simple and controllable process, and is suitable for large-scale production.