The invention discloses a bionic robot for tracking and diluting underground gas. The robot comprises a robot body, a crawler-type driving device, a friction protection structure, a supporting structure, a gas collecting and detecting device, a power module, a microprocessor module, a wireless sending module, a camera and a folding fan device. According to the bionic robot for tracking and diluting underground gas, firstly, the robot can analyze concentration information collected by the gas collecting device by using a drosophila learning strategy-based odor source positioning algorithm (CNN-LSTM-FOA) equipped on a microprocessor of the robot, so tracking of the gas is realized, and leaked smell source positioning work can be carried out in time; secondly, the robot is provided with an intelligent folding fan, after the robot is positioned to a gas leakage place, the intelligent fan is switched into a working mode, the fan can increase the flow speed of underground air, the concentration of gas in the gas leakage space is diluted to a certain extent, and more time is won for external rescue work.