The invention discloses a household ice making machine and a control method thereof. The household ice making machine comprises a refrigerator, an ice making machine core and an ice storage box, wherein the refrigerator is internally provided with a refrigeration chamber, and comprises a refrigeration assembly; the ice making machine core is arranged in the refrigeration chamber, and comprises an ice tray, an ice unloading assembly and a water injection assembly; and the ice storage box is arranged below the ice making machine core. According to the household ice making machine, after the ice making machine core accomplishes ice making and ice unloading is performed, ice enters the ice storage box for storage; and the refrigerator can maintain the temperature in the refrigeration chamber, so that ice melting can be avoided, and the ice can be stored in the ice storage box better for use.