The invention discloses a technique for removing gallic acid in wastewater by using Ceriporiopsis subvermispora thallus, relating to the field of bioengineering. The technique comprises the following steps: by using Ceriporiopsis subvermispora as the initial strain, carrying out liquid shake culture and liquid thallus amplification culture to obtain the Ceriporiopsis subvermispora thallus; and removing the gallic acid in the wastewater by using the thallus. By using the technique, the removal rate of the gallic acid can reach 70-100%.