The invention discloses a vehicle load action position recognizing method based on a fiber bragg grating sensing technology, relating to the field of vehicle load action position recognition and solving the problem that the fiber bragg grating sensor can not acquire the vehicle load action position when carrying out real-time monitoring to road information. The vehicle load action position recognizing method comprises the following steps of: firstly, leading a fiber bragg grating sensor group (M) to cross a measured road cross section (Q); using a data acquisition instrument to acquire the strain data output by the fiber bragg grating sensor group (M) in real time; when vehicle load (W) acts on the road cross section burying the fiber bragg grating sensor group (M), acquiring the strain data output by the fiber bragg grating sensor group (M) by the data acquisition instrument; and finally, judging the action position of the vehicle load (W) according to that the strain data is a positive value or a negative value. The method is used for recognizing the vehicle load action position.