Safe blood sampling device

The invention belongs to the field of medical instruments, and relates to a safe blood sampling device which comprises a mounting seat, a safe protection sleeve and an inner core rod, one end of the inner core rod is fixed to the mounting seat, the other end of the inner core rod is fixed to a steel needle, the periphery of the inner core rod is sleeved with the safe protection sleeve, and the rear end of the safe protection sleeve is inserted into an inner cavity of the mounting seat; a sliding buckle is arranged at the front end of the outer wall of the inner core rod in the safety protection sleeve, a fixed buckle is arranged on the rear portion of the inner cavity wall of the safety protection sleeve, the side face, close to the installation base, of the sliding buckle is an inclined face, the side face, away from the installation base, of the fixed buckle is an inclined face, and the inclined face of the sliding buckle is matched with the inclined face of the fixed buckle. A plugging ring block is fixed