The invention discloses a protective monitoring kneecap comprising an EVA (ethylene-vinyl acetate) damping ring and spandex fixing parts arranged on the left and right sides of the EVA damping ring and also comprising a wavy silicone strip, one side of each spandex fixing part far away from the damping ring is provided with a pressure sensor, and the two pressure sensors are positioned at the inner femur and outer femur parts of the knee. In addition, the protective monitoring kneecap also comprises a chip, a Bluetooth module and two pressure sensors. The protective monitoring kneecap decreases the range of adductive and abductive activities and inward and outward rotations as far as possible at the premise of ensuring flexion and extension of the coronal plane of the knee, pressure on the knee is reduced, the patella can be stabilized, the knee has less sliding, and the motion angle of the knee can be limited to avoid injury; in addition, the protective monitoring kneecap has good resilience, tensile strength, and damping and buffering properties, can effectively prevent and protect the knee from slipping or displacing and loosening along with movement, and also has a monitoring function, real-time reminders can be provided for users to notice the unsuitable pressure, and optimization of an exercise scheme can be assisted.