The invention relates to the technical field of container bags, and particularly relates to a container bag capable of telescoping according to a capacity. The container bag comprises a cylindrical container bag base body, wherein at least two oppositely-arranged hanging belts are arranged on the upper edge of the container bag base body; a wrinkle part is arranged at the middle of the container bag base body; and at least two pairs of uniformly-arranged binding belts with tied tops and bottoms are uniformly arranged on the wrinkle part and at the outer side of the container bag base body. The telescopic circular container bag disclosed by the invention is simple in structure, reasonable in design, and capable of telescoping according to the bearing capacity; and replacement of container bags with different sizes is not required, so that the telescopic circular container bag facilities mechanical operation and is convenient to use.