The invention discloses a binary package tank for an aerosol. The binary package tank comprises a tank body with openings in the two ends. The opening in one end of the tank body is provided with an aerosol valve mechanism in a packaged manner, the tank body is internally provided with a plastic component partition layer capable of partitioning two different types of contents, and the end face of one side of the plastic component partition layer is provided with a plurality of supporting frameworks; one end of each supporting framework is arranged on the aerosol valve mechanism or the inner wall of the tank body in a jacking and pressing manner, and the opening in the other end of the tank body is provided with a piercing actuation device capable of piercing the plastic component partition layer. Disadvantages in the prior art are overcome, the binary package tank for the aerosol is simple in structure and convenient to use, two types of materials can be stored independently, and the two materials can be mixed and used rapidly when the binary package tank is used.