An embedded short leaf-spring-equipped crystal head includes a crystal head body insertable into a base slot of a base and a leaf spring disposed above the crystal head body to fasten the crystal head body to the base, characterized in that a length of the leaf spring is less than or equal to a length of the base slot. The length of the leaf spring is less than or equal to the length of the base slot. After the crystal head body has been inserted into the base slot, the leaf spring is disposed inside the base and thus is not exposed. Hence, space utilization rate of the crystal head body increases, and the positioning of the crystal head body is not compromised as a result of damage otherwise caused to the leaf spring, thereby preventing unauthorized persons from taking out the crystal head body and enhancing data security.