The invention provides an electrolyzed water sterilization device, which comprises a shell, wherein an upper 
electrode and a lower 
electrode are arranged in the shell; an 
electrode isolating plate used for isolating a 
cathode and an 
anode of the electrodes and keeping a distance between the electrodes is arranged between the upper electrode and the lower electrode. After the device is electrified, the upper electrode and the lower electrode decompose a water molecule into an 
hydrogen ion (H+) and an 
oxygen ion (O-), the 
oxygen ion used as a negative ion is reacted with other 
peripheral water molecules to generate 
hydroxide radical (OH-), at the time, a small amount of 
sodium hypochlorite (HOCL) containing microamount 
chloride components existed in 
tap water is also decomposed into HCL+ and O-, and dissolved 
oxygen (O-, O3-) negative ions and 
hydrogen peroxide sterilization substances are produced, so that water is sterilized. The electrolyzed water sterilization device provided by the invention is applied in 
titanium electrode 
electrolysis, can achieve a sterilization effect without influencing 
water quality. The device has high design reliability, a long life, a good sterilization effect, low cost, no need for adding a sterilizing agent, and no secondary 
pollution.