Portable Baby Bottle Sterilizer, the sterilizer includes a shell and a door that can be opened or closed, the upper part of the shell has a power supply and a switch, and the shell has a slot that can block the screw and the nipple and an ultraviolet negative ion lamp. The sterilizer There can also be another card slot that can block the bottle body of the baby bottle and an ultraviolet negative ion lamp tube that can be inserted into the bottle body. When disinfecting, open the door, put the screw and the nipple into the slot, or put the bottle body at the same time Put it into the bottle card slot and press the power switch to sterilize the milk bottle. The portable milk bottle sterilizer described in this utility model is small in size, convenient to carry, simple to use, and convenient to sterilize the milk bottle anytime and anywhere. Especially when there is no conventional disinfection conditions, such as babies going out, it is more convenient.