The basic principles of multi-parameter tunable optical fiber grating wavelength tuner based on stress, displacement, space angle are analyzed and relative experimental researches are performed. According to the tunable formulas derived in detail, a series of numerical simulations about tuning relationships are presented. On the basis of numerical simulations, we design a multi-parameter tunable optical fiber grating wavelength tuner based on stress, displacement, space angle. Then we carry out relative experimental research. Experimental results indicate that the relation of center wavelength tuning with the force and displacement is linear. The linearity of three fiber Bragg grating (FBG) are above 0.9975. With space angle as a function of the wavelength of FBG, the fitting curves are approximately sine (cosine) relations. And the experimental results match the theoretical analysis perfectly.