A brush head component connection system, applied in a personal care utensil, comprises: a brush head component and a motor bracket (11) mounted on a personal care utensil casing (13), a motor (10) disposed in the motor bracket (11), and a seal ring (12) located between the motor bracket (11) and the personal care utensil casing (13). A driving shaft of the motor (10) is disposed in holes at the center of the bottoms of the motor bracket (11), the personal care utensil casing (13) and the seal ring (12), and has an end connected to one end of an eccentric shaft (14). The other end of the eccentric shaft (14) deviates from the central position and is connected to the driving shaft connected onto the brush head component. In the brush head component connection system, the motor (10) is connected to the brush head component only through simple components such as the eccentric shaft (14) and the driving shaft, and the motor (40) drives the eccentric shaft to rotate through rotation of the driving shaft, so as to drive the brush head component to rotate; therefore, the energy consumption is low.