The invention belongs to the field of medical first-aid equipment and particularly relates to a cervical vertebra injury fixation protector adopting combined locking of the head, shoulders and the chest. The fixation protector comprises a pair of head, chest and back bracket rings, two ear pillows, a chest piece, a head and chest locking rod and two head and shoulder locking rods, wherein each head, chest and back bracket ring comprises a head supporting part and a chest and back supporting part which are integrally connected, the two ear pillows are symmetrically arranged on two sides of the head supporting part, the chest piece is connected onto the chest and back supporting part through a fixing band, one end of the head and chest locking rod is connected with the chest piece, a jaw support is arranged at the other end of the head and chest locking rod, the two head and shoulder locking rods are arranged on the two ear pillows in a penetrating manner, and a shoulder support is arranged at one end, facing the chest and back supporting part, of each head and shoulder locking rod. With the adoption of the fixation protector, secondary injuries after parts such as cervical vertebras, cervical cords and the like are injured on first-aid scenes can be relieved, relative movement of injured cervical vertebra parts can be efficiently controlled, the wounded can be carried safely, cervical vertebra injuries are treated conveniently and effectively in a first-aid manner, the secondary injury disability rate after the cervical vertebra injuries is decreased, and potential medical dispute risks can also be effectively and completely eradicated.