A novel combination type sensing structure of the torsion beam has been designed, in which the fiber grating with a determinate length is bonded to the interface between the solid beam and air core beam with a determinate angle along the direction of the axes of the torsion beam. Using the difference of the strain distribution at the two sides of the interface between the real core beam and air core beam, through measuring the reflective wavelength difference of two sides of the interface, the torsional sensing of the fiber grating with the temperature independent has been realized. Theoretical analyses and experimental results indicate that this sensor can automatically remove the temperature cross sensitivity in torsional sensing, the wavelength shift difference of the fiber grating in the sides of the interface is linear to the torsional angel, the torque and torsional stress with the determinate arm of force, and this relationship is not dominated by the temperature change. In the range of the torsional angle and torque sensitivities are 0.092 nm/degree, 2.076 nm/Nm, respectively.