The traditional precise position sensor is susceptible to electromagnetic interference and poor compatibility of composite materials under complicated conditions. A distributed position and pressure doubleparameter sensor is proposed based on long chirped fiber grating. A doubleparameter sensing model of long chirped fiber grating is established, and the theoretical model of doubleparameter sensor based on long chirped fiber grating is validated by numerical simulation. A doubleparameter sensing system for long chirped fiber gratings is developed. The experimental results show that the sensor has a spatial resolution of 50 μm and a linearity of 99.99% for the position measurement in the full scale range. This sensor also has a sensitivity coefficient of 0.003 399 dB/N and a linearity of 99.8% for the transverse force. This sensor can be applied to precise lateral force and location measurement in complex environment.