The invention discloses a 
fiber laser earthquake monitoring early warning device comprising a 
metal tube, an 
optical fiber, a 
laser, a range finder, a data acquiring end, a data transmitting end, and an earthquake alarming device. The 
metal tube is vertically disposed under a ground surface, and the upper end of the 
metal tube is exposed out of the ground surface. The 
optical fiber is vertically disposed in the metal tube, and the 
laser is disposed on the upper part of the metal tube, and is connected with the 
optical fiber. The range finer is disposed on the metal tube on the upper part of the ground surface, and the data acquiring end and the data transmitting end are disposed on the ground surface, and are electrically connected with the range finder. The earthquake alarming device is disposed on the ground surface, and is electrically connected with the data transmitting end. When an earthquake occurs, the metal tube under the ground surface is distorted and deformed, and the optical 
fiber is compressed or even destroyed, and then the circuit of the range finder is used to detect the 
distortion deformation position, and is used to transmit a 
signal to the data acquiring end, and then the 
signal is transmitted by the data transmitting end, and in addition, the earthquake alarming device is used to give alarms. A control center is disposed on the ground surface, and the control center is used to transmit the received 
signal to a personal 
cell phone mobile terminal by a communication 
system in order to prompt 
population evacuation.