Objective To observe the effect of the supine-posture ripple wood training in preventing motion sickness caused by linear acceleration. Methods Totally 61 motion sickness sensitive males were screened by a vertical oscillation simulator and divided into mildly sensitive group (Graybiel score 1-15, n＝28) and severely sensitive group (Graybiel score ≥ 16, n＝33). The participants in the 2 groups received 5-d ripple wood training, 30 min/d. The movement frequency of the ripper wood was maintained at 0.25-0.35 Hz, with an acceleration of 0.15-0.25 g. Graybiel score during the training period was recorded. The static balance function test was conducted before and after training on the 1^st and 5^th day. Results During the training period, the Graybiel scores and motion sickness incidence in the severely sensitive group were decreased with the increase of training days, and all participants achieved complete acclimatization on the 4^th day. The Graybiel scores of the mildly sensitive group were low during the whole period, and the complete acclimatization period was 2 d. There was no significant difference in the sway area of the severely sensitive group in static balance function test before and after training (P＞0.05). The mean velocity of the severely sensitive group in static balance function test was significantly increased after training versus before training on the 1^st day (P＜0.01), and there was no significant difference before and after training on the 5^th day (P＞0.05). There were no significant differences in the sway area or mean velocity of the mildly sensitive group during the whole training period (all P＞0.05). The validation experiment showed that the motion sickness incidence and the symptom severity were significantly decreased in both groups; the motion sickness incidence of the mildly sensitive group decreased from 100.00% (28/28) to 35.71% (10/28); the incidence of severe symptoms in the severely sensitive group decreased from 100.00% (33/33) to 6.06% (2/33) and the vomiting incidence decreased from 96.97% (32/33) to 6.06% (2/33). Conclusion The supine-posture ripple wood training has great effect in preventing motion sickness, with widespread use and simple operation.