The invention discloses a space-increasing safety wire collection box, which comprises a stretchable outer box and a rotary inner box. The stretchable outer box comprises a first stretch outer shell and a second stretch outer shell capable of moving relative to the first stretch outer shell, and the rotary inner box available for pulling and rotation is arranged in the stretchable outer box. A multi-directional pulling and rotating structure is provided, space increasing can be realized by bilateral pulling of the stretchable outer box, wire arrangement directions can be freely turned after the rotary inner box is pulled of the stretchable outer box, and accordingly different wire arrangement demands in use can be met. When a temperature sensing block detects that the internal temperatureof the box is higher than a set value, a controller sends out instructions to start a cooling device for reduce the internal temperature of the box, so that service lives of electrical elements in thebox are greatly improved. When the temperature exceeds a threshold and reaches an abnormal limit, the controller enables a temperature alarm loudspeaker to operate to remind a user of danger prevention, so that the space-increasing safety wire collection box is a device capable of providing safety and convenience for people's life.