The invention discloses a bacterial strain composite carrier material for restoration of atrazine polluted soil as well as a preparation method and an application thereof. The bacterial strain composite carrier material is prepared from atrazine degrading bacterial strains and a carrier material through a granulation process, wherein the carrier material consists of bentonite, crushed crude pearlite and humic acid. Researches show that the bacterial strain composite carrier material provided by the invention can be used for effectively improving high temperature and ultraviolet ray tolerance of the bacterial strains and completely degrading the atrazine in soil, and simultaneously causes small interference to soil microbial diversity. Therefore, the bacterial strain composite carrier material for the restoration of organic pollution of the soil is used for providing technical support for the restoration of the atrazine polluted soil, effectively solving the problem of the restoration of the atrazine polluted soil and also providing references for biological restoration of other types of soil organic pollution.