The invention relates to an electric vehicle electricity conversion battery box capable of being precisely located. The battery box comprises a box body, wherein a battery box inertial navigation fixing module and a battery box inertial navigation component arranged on the battery box inertial navigation fixing module are attached to the bottom of the box body; the bottom of the box body is provided with a groove used for installing the battery box inertial navigation fixing module, and the battery box inertial navigation fixing module is fixed into the groove through bolts; the two ends of the battery box inertial navigation fixing module are attached to the wall of the groove. By means of the arrangement of the battery box inertial navigation fixing module and the battery box inertial navigation component, the position of a battery is recognized through inertial navigation, various adverse factors such as parking of a vehicle and deformation of the battery box are overcome, and the position of the battery can be precisely recognized at any position in a monitoring area. Precise positioning of the battery is facilitated after replacement, installation is stable, posture recognition errors caused by deformation of materials can be reduced to the largest extent, and the requirement for quick replacement of the battery of a high-mass electric vehicle is met.