Abstract: In order to solve the problem that the well-cementing cement is not strong enough and vulnerable during the oil and gas exploitation，a study of the corrosion process of H2S on cementing materials is carried out.The study is carried out in two aspects：through the study of the corrosion process of H2S gas on calcium carbonate and weak alkaline water-bearing carbonates，the stability of all compounds in the cement is obtained.After a research of the change of the volume and size of the corrosion products，it can be concluded that：the destruction of cement is caused by the accumulation of corrosion products in the cement pore space；through the study of the corrosion effect of the H2S dissolved in the liquid on cement，the corrosion factors of H2S on cement have been acquired.And another conclusion is drawn：reducing the porosity and permeability of rocks which are exposed to well-cementing cement can reduce the corrosion rate of cement.These conclusions have a certain significance for the high sulfur reservoir.

Key words: high sulfur reservoir, cementing, cement, corrosion, hydrogen sulfide, low porosity and permeability