A method and a device used for controlling a plurality of tenants to use a computer resource in data base service. The method used for controlling the plurality of tenants to use computer resource in the data base service includes the following steps: intercepting a task of visiting the computer resource, wherein the task is an operation system procedure or thread; recognizing the tenant which is relevant to the task in the plurality of tenants; determining other tasks of visiting of the tenant to the computer resource; and controlling the using of the computer resource of the task so as to enable the general usage amount of the computer resource through the task and other tasks not to exceed the usage upper limit of the computer resource of the tenant.