The electrolytic water teaching equipment consists of a transparent electrolytic cell, two inert graphite electrodes, a voltage regulator power supply, and a gas collection tube. The cell body is marked with precise scales, which can clearly observe the 2:1 phenomenon of hydrogen and oxygen volume. 5 V safe low voltage one click start, equipped with red and blue LED indicators for positive and negative poles, students can see the generation of bubbles and changes in water level in real time. The whole machine is only A4 in size and can be placed in a storage box. It is suitable for classroom demonstrations and group exploration, and is an essential electrolysis kit for primary school science to junior high school chemistry.