Abstract:The unbalance of operation of horizontal cylindrical washer in the process of dehydration will lead to abrasion of the equipment so as to reduce the lifetime of the washing equipment. The method of water injection is adopted to solve the problem, three water injection tanks which are uniform distributed can correct eccentric quality of clothes when horizontal cylindrical washer is in the process of dehydration. When in ideal injection condition, the balance theory of drum dehydration process is analyed and math expression of waterflood equilibrium coefficient is given in the paper. Using dynamics simulation software ADAMS to simulate the feasibility of water injection structure and eccentric quality on roller center, and the results can provide further theoretical basis for the research and development of waterflooding balanced platen washing machine.