Device for researching carbon dioxide diffusion front edge and method of device

The invention provides a device for researching a carbon dioxide diffusion front edge and a method of the device. The device for researching the carbon dioxide diffusion front edge comprises a carbon dioxide injection system, a detecting system and a liquid injection system, wherein the carbon dioxide injection system comprises a carbon dioxide gas cylinder; the detecting system comprises a transparent detecting tube and a connector which communicates with an external pipeline; the connector comprises a first connector and a second connector; the liquid injection system comprises a liquid storage container; the gas cylinder communicates with the first connector; the first connector communicates with one end of the transparent detecting tube; the other end of the transparent detecting tube communicates with the second connector; and the second connector communicates with the liquid storage container. The experimental device can realize online measurement, has the characteristics of high speed and high sensitiv