The invention provides a fireman site navigation device used for performing three-dimensional positioning and assisting firemen in quickly implementing fire extinguishing rescue on a fire site. The device mainly comprises a few core modules, namely a central control module, a three-dimensional positioning module, an external storage module, a communication module, an input/output module and a protective shell; and the three-dimensional positions of the firemen on the fire site are determined by collaboration of the core modules and notified to the firemen in a clear intuitive voice or image mode, meanwhile, the positions of various fire fighting facilities are indicated to the firemen, and navigation service is provided for the firemen. Through the device, the functions of eyes and ears of each fireman on the fire site can be similarly enhanced; and meanwhile, the device is combined with an assorted command system, so that the commander can command the fire rescue more clearly and intuitively, the fighting capacity and the protecting capacity of the firemen in the fire are enhanced to certain degree, and great assistance is provided for improving the fire extinguishing rescue capacity of the fire fighting unit.