A speed change display control device for a traveling work vehicle comprising: a main speed change device configured to switch between speed change stages without interrupting transmission of drive power; an auxiliary speed change device configured to switch between speed change stages accompanied by an interruption in the transmission of drive power; a speed change controller configured to output a speed change control command to the main speed change device and the auxiliary speed change device and to create a vehicle speed change ratio with combinations of main speed change stages of the main speed change device and auxiliary speed change stages of the auxiliary speed change device; characterized in that the speed change controller has a screen generator configured to generate at least a first screen data and a second screen data, the first screen data is configured to output: a first auxiliary area to display a group of the auxiliary speed change stages; a first main area to display a group of the main speed change stages assigned to the auxiliary speed change stages; and a current stage area to display an auxiliary speed change stage and a main speed change stage in use, and the second screen data is configured to output: a second auxiliary area to display the group of the auxiliary speed change stages; a second main area to display the group of the main speed change stages; a lower limit selection area to accept a selection input of the speed change stage defining a lower limit of the vehicle speed change ratio; an upper limit selection area to accept a selection input of the speed change stage defining an upper limit of the vehicle speed change ratio; and a limit stage area to display the upper limit and lower limit speed change stages which are currently selected. a main speed change device configured to switch between speed change stages without interrupting transmission of drive power; an auxiliary speed change device configured to switch between speed change stages accompanied by an interruption in the transmission of drive power; a speed change controller configured to output a speed change control command to the main speed change device and the auxiliary speed change device and to create a vehicle speed change ratio with combinations of main speed change stages of the main speed change device and auxiliary speed change stages of the auxiliary speed change device; characterized in that the speed change controller has a screen generator configured to generate at least a first screen data and a second screen data, the first screen data is configured to output: a first auxiliary area to display a group of the auxiliary speed change stages; a first main area to display a group of the main speed change stages assigned to the auxiliary speed change stages; and a current stage area to display an auxiliary speed change stage and a main speed change stage in use, and a first auxiliary area to display a group of the auxiliary speed change stages; a first main area to display a group of the main speed change stages assigned to the auxiliary speed change stages; and a current stage area to display an auxiliary speed change stage and a main speed change stage in use, and the second screen data is configured to output: a second auxiliary area to display the group of the auxiliary speed change stages; a second main area to display the group of the main speed change stages; a lower limit selection area to accept a selection input of the speed change stage defining a lower limit of the vehicle speed change ratio; an upper limit selection area to accept a selection input of the speed change stage defining an upper limit of the vehicle speed change ratio; and a limit stage area to display the upper limit and lower limit speed change stages which are currently selected. a second auxiliary area to display the group of the auxiliary speed change stages; a second main area to display the group of the main speed change stages; a lower limit selection area to accept a selection input of the speed change stage defining a lower limit of the vehicle speed change ratio; an upper limit selection area to accept a selection input of the speed change stage defining an upper limit of the vehicle speed change ratio; and a limit stage area to display the upper limit and lower limit speed change stages which are currently selected.