The present invention relates to a method for making a noctilucent flag, which is characterized in that the method sequentially comprises the following steps: step 1, raw material preparation: 30 to 70 wt% of noctilucent powder and 30 to 70 wt% of sun-proof gloss oil are mixed; step 2, stirring: the noctilucent powder and the sun-proof gloss oil are stirred, therefore, the noctilucent powder suspends in the gloss oil to form suspension; step 3, the suspension is coated on the flag surface by spraying or silk screen printing; and step 4, the flag surface coated with the suspension is dried or naturally aired. Compared with the prior art, the present invention has the advantages of simple and reliable making steps and low making cost, and the obtained product has the advantages of good noctilucent performance, long service life and uniform noctilucent powder.