A kind of enhancement micro fiber Bragg grating (FBG) strain sensor is used to test static pressure precast pile force during precast pile driving. We make a groove on the surface of the model pile body to bury FBG strain sensor, use static pressure precast pile penetration model experiment to test stress states in real time, and analysis profiles of axial force of pile shaft and side friction of pile with embedded depth. Experiment results show that the enhancement micro FBG strain sensor can be embedded well with model pile and can test stress states of model pile exactly. In addition, this kind of FBG sensor shows advantages of high prefabricated success rate and easy installation.