An experimental study on intensifying osmotic dehydration was carried out in a state of nature and with acoustic cavitation of different cavitating intensity (0.5A, 0.7A and 0.9A) respectively, in which the material is apple slice of 5 mm thickness. The result showed that acoustic cavitation remarkably enhanced the osmotic dehydration, and the water loss was accelerated with the increase of cavitating intensity. The water diffusivity coefficients ranged from 1.8x10(-10) m(2.)s(-1) at 0.5A to 2.6x10(-10)m(2)-s(-1) at 0.9A, and solute diffusivity coefficients ranged from 3.5x10(-11) m(2.)s(-1) at 0.5A to 4.6x10(-11) m(2.)s(-1) at 0.9A. On the basis of experiments, a mathematical model was established about mass transfer during osmotic dehydration, and the numerical simulation was carried out. The calculated results agree well with experimental data, and represent the rule of mass transfer during osmotic dehydration intensified by acoustic cavitation.