The invention discloses a safety device for a socks steam shaping machine. The safety device comprises a protective baffle and a pull rope switch component; the protective baffle is vertically arranged at outside of an inlet of a steam shaping box; the pull rope switch component comprises a switch main body, a signal cable and a wire rope; the switch main body is fixedly arranged at the inside of the upper end of the protective baffle, and electrically connected to a controller of the steam shaping machine through a signal cable; the wire rope is vertically arranged, and the upper end thereof is connected to a pull rod of the switch main body while the lower end is fixedly arranged on the protective baffle; a space is formed between the wire rope and the protective baffle on a horizontal direction; when the wire rope is deformed for a body or an arm of a person collides with the wire rope so that the tension is changed, the socks steam shaping machine is stopped. Effective protective measures are applied to a box opening of the shaping box, thus workers can shut down the whole device through active or passive touch, and personal safety of workers can be timely and effectively protected.