The invention discloses a movable socket device for a desk. The movable socket device comprises a plug, a control switch, a support frame, a threaded connecting rod, a connecting plate, a box body, asliding rail, a metal contact strip, a moving socket, a chute, a wire. The plug is electrically connected with the control switch, the control switch is connected with the metal contact strip, the housing at the upper end of the box body is in injection molding with a slide rail, the lower end of the slide rail is provided with the metal contact strip, the moving socket is installed on the slide rail, the chute is installed at the position of the central axis position of the lower end of the box body, the support frame is screwed with the threaded connecting rod. According to the movable socket device for the desk, a regulation pin rod is rotated to regulate the length of the threaded connecting rod to allow the device to be installed at the lower end of the desktop of the desk, the support frame supports the desk board body to fix the whole device, the moving socket is pressed down, the moving socket is separated from the metal contact strip on the slide rail, the device is powered off, the moving socket is released after the position is regulated, the spring pushes the moving socket up, the metal contact strip is connected with the moving socket for power on, the control switch is installed at the desktop to facilitate control.