The utility model relates to a miniature fixed-point temperature dynamic display meter, which is mainly composed of a work frame, a light-emitting diode, a steel needle, a capillary, a battery, a copper box, and mercury. As shown in Figures 1 and 2, the I-shaped frame, copper box, and capillary tube form a connector. Steel needles are pierced on the capillary tube. There are porcelain rings and mercury in the copper box of the connector. The air chamber of the I-shaped frame is compressed gas, and the copper box After being heated, the mercury column of the capillary moves backward, and the contact between the mercury and the steel needle is disconnected, so that the original light-emitting diode is extinguished. According to the extinguishment of the light-emitting diode, the temperature changes dynamically. It has no moving parts, microstructure, stable performance, and durable , easy to manufacture, convenient for long-distance observation and network display.