Provided are an ozone sterilization washing machine and a method. The ozone sterilization washing machine comprises an outer barrel (1), an ozone generation device (2) and a heating device (3), wherein an air inlet communicated with the ozone generation device (2) is arranged at the bottom of the outer barrel (1), an exhaust hole is arranged at the upper part of the outer barrel (1) and communicated with an exhaust pipeline (10), and the heating device (3) is arranged in the exhaust pipeline (10) to decompose ozone. According to the ozone sterilization washing machine, clothes are sterilized with ozone, and ozone which is not completely dissolved is thoroughly decomposed under a high temperature at a high decomposition rate; in addition, no catalyst is added, thus saving manpower and material resources.
