With the expansion of single facilities in the Chinese laboratory animal industry, optimal cage washingmethod are becoming more important. The current study investigates the configuration of cage washing machines in China,where 66 facilities have been equipped with washers, of which 67% are equipped with two or more types. Many factors needto be considered for cage washers, cage and rack washers and tunnel washing machines during the design stage of newlybuiltfacilities, and these factors are discussed in the current study. Washing equipment is the foundation of laboratoryanimal facilities, and in the future, automatic washers will be another milestone in the development of laboratory animal facilities in China.