Abstract: In this article, taking the temperature data measured in demonstration mine gob as experimental basis, taking domestic mine ventilation theory, the gas flow and heat transfer theory as the theoretical basis, we used Fluent software to carry on forward and inverse temperature field bidirectional analog, two simulations results were compared with each other and confirmed, which determined the source of fire gob hidden location and analyze its error detection, the model was established based on gob hidden fire source detection and inverse bidirectional analog goaf model.