The invention relates to aerospace special lifesaving medical protective equipment, in particular to an impact-protection helmet system. According to the technical scheme, a buffer is characterized by comprising an outer cylindrical tube (9), a self-control speed-limiting piston (10), upper seal cover (8), a lower seal cover (11) and a lower spherical head connection rod (7). A shock-resistant and neck-protective helmet system is characterized by comprising a helmet (1), two buffers, a universal joint base cushion (3) and a shoulder-protection cushion (4). When the head is impacted, the buffers have the protective effect, and kinetic energy acted on the cervical vertebra when the worn helmet experiences impact load in the vertical or horizontal direction is absorbed and reduced, so that the cervical vertebra is protected against being hurt. The system is simple in structure and convenient to use.