Screw with stacked screw heads

The invention discloses a screw with a stacked screw head. The screw comprises a thread part and a screw head part, the thread part is suitable for being locked into the locking piece; the screw head is connected to the threaded part so as to drive the threaded part to rotate by rotating the screw head, the screw head comprises a first screw head and a second screw head, and a first groove is formed in the top of the first screw head so that torsion applied to the first groove can drive the first screw head to rotate; the bottom of the first screw head is connected to the top of the second screw head through the neck part, the top of the second screw head is provided with a second groove, and the bottom of the second screw head is connected to the thread part. And the bearing capacity of the joint of the neck part and the first screw head or the second screw head on torsion is smaller than that of the first screw head and the second screw head on torsion. 一种具有堆叠式螺丝头的螺丝，包括螺纹部以及螺丝头部。螺纹部适于锁固至锁固件中；螺丝头部连接至螺纹部以通过转动