This product is designed for 6-9-year-old children in the tooth replacement period. Its main function is to assist in reminding the toothbrush to brush for three minutes and sterilizing the toothbrush. This brushing timer is assembled on the wall. When children brush their teeth, they only need to remove the toothbrush and the timer will automatically start a three-minute countdown. After the countdown is over, a prompt sound will be issued to remind children to finish brushing their teeth and put the toothbrush back into the toothbrush bin. The toothbrush bin will automatically retract the body and start UV disinfection. The whole disinfection process will be carried out in the machine bin without any purple light leaking out and causing harm. This product can realize the serialization of the product by replacing the ear. The ear is replaced with a magnetic structure, and different ear screens will also be replaced with different expressions. When the timer is in a non-working state, the screen displays the animal expression interface. When in use, just pull the toothbrush timer to start working. After taking out the toothbrush, the screen interface will automatically switch to the countdown interface, and the countdown will start after 10-15 seconds. After the countdown is over, a beep will sound. At this time, putting the toothbrush back into the toothbrush compartment will automatically retract the body and then start disinfection.