The invention discloses a compound self-adhesive sealing strip. The compound self-adhesive sealing strip comprises an elastic core body made of an elastic material, a mucilage glue layer arranged on the outer wall of the elastic core body in a wrapping manner and a release layer attached to the outside of the mucilage glue layer, the mucilage glue layer is internally and fixedly provided with pull-resistant lines arranged in the length direction of the elastic core body and used for enhancing the tensile strength of the sealing strip, and the length of the pull-resistant lines is equal to that of the elastic core body. The sealing strip is reasonable in structure; when the sealing strip is installed and used, the compound self-adhesive sealing strip is tightly bonded between two components to obtain a better sealing effect, on the basis of the better sealing effect, due to existence of the pull-resistant lines, the tensile force generated when the sealing strip is installed is borne by the pull-resistant lines, the sealing strip cannot be lengthened, and in this way, the sealing strip can be prevented from being lengthened and deformed when the sealing strip is installed, so that it is guaranteed that thicknesses on all portions of the compound self-adhesive sealing strip in the length direction can be uniform so as to guarantee the sealing effect.