A safety airbag device, including a safety airbag having an inflated state and a stowed state, a gas generator, used to generate gas to inflate the safety airbag so that the safety airbag enters the inflated state; and a deflector, used to guide the gas generated by the gas generator before the gas generated by the gas generator enters the safety airbag. The deflector includes a first cavity and a second cavity. The first cavity includes a first gas inlet and a first gas outlet. The second cavity includes a second gas inlet and a second gas outlet. The first gas outlet and the second gas inlet are in fluid communication with each other.