The invention relates to master batches capable of removing VOCs in recycled polyester under the conditions of light and darkness. The master batches are prepared from, by mass, 60-75% of polyester, 10-15% of aldehyde inhibitor modified activated carbon, 12-19% of rare earth element doped photocatalyst, 2-4% of heat stabilizer, 2-4% of ether inhibitor and 1-2%% of zinc stearate, wherein the rare earth element doped photocatalyst is composed of a rare earth compound, a photocatalyst and a photocatalyst dispersing agent, and the master batches comprise, by mass, 2-4% of photocatalyst dispersingagent. When added into the recycled polyester, the master batches can efficiently remove the VOCs in the recycled polyester under the conditions of light and darkness. The production process is simple, the VOCs in the recycled polyester can be efficiently removed, and the popularization value is very high.