Chemical reaction monitoring device of high-precision optical lever based on optical signal

The invention relates to a chemical reaction monitoring device of a high-precision optical lever based on optical signals, in particular to the field of high-precision monitoring. The chemical reaction monitoring device of the high-precision optical lever based on the optical signal comprises a shell, a partition plate, a light source and a receiving plate. When the process of the chemical reaction needs to be monitored, reactants of the chemical reaction are arranged in the second cavity of the shell, and when the chemical reaction generating gas changes the medium in the second cavity, namely, the refractive index in the second cavity of the shell is changed, so that the position of the optical signal generated by the light source transmitted to the receiving plate in the second cavity is changed, and the chemical reaction process is obtained through the corresponding relation between the change condition of the position of the optical signal received on the receiving plate and the chemical generation proce