Abstract: The invention describes a safety replaceable heel mechanism that is used to adjust the height of women's shoes. The mechanism comprises a shoe sole, a removable heel comprising a heel connector and an interchangeable heel, and a locking key to securely connect the removable heel to the shoe sole. The heel is detached and the shoe can be worn without the heel, providing a pair of shoes suitable for different occasions. The invention is provides a stable structure avoiding unwanted movement of the removable heel for adjusting the comfort of a particular pair of shoes during the course of a day.