The invention relates to a number changing plate, which includes several lamp groups for displaying numbers, an accommodating frame, a main power switch key, a group of on and off sign lights, a power supply and a control circuit. The accommodating frame is provided with several accommodating parts, the accommodating parts are used to accommodate a lamp group and an on-off switch for switching the lamp group, the on-off switch is located below the lamp group, the on-off switch and the The lamp group is electrically connected. The operator can press the lamp group to close the on-off switch corresponding to the lamp group. When the lamp group is pressed again, the on-off switch at the corresponding position is turned off, the circuit where the lamp group is located is disconnected, the lamp group is turned off, and thus the lamp group is extinguished. The number changing plate of the invention has low production cost, extremely intuitive, clear and simple operation, high reliability and great development prospect.