The utility model relates to a rectangle polypropylene interval sword card that permeates water, including polypropylene material's sword card body, sword card body is equipped with one row of vertical permeable through hole who closely arranges, and the permeable through hole both sides are equipped with the rib piece of symmetrical arrangement, and sword card body is equipped with equidistance spaced sword card draw -in groove. The utility model discloses an one shot forming or fashioned polypropylene material many times, environmental protection, pleasing to the eye, the cutting convenient to use of appearance, body toughness elasticity is good, the deformation of adaptation outdoor ground expend with heat and contract with cold, the nimble big or small shape of adjusting sword card body colour, length and box of indoor outer occasion, but in separating planting technique, pack decoration stone, decorative brick etc. The permeable through hole's of sword card body infiltration is rapid, does benefit to the flashing of moisture at the fine day, and it beautifies to do benefit to the urban road cleanness, being fit for the extensive metaplasia of industry and producing, low in production cost, sexual valence relative altitude have extensive application prospect in city building roof, municipal afforestation, road engineering row, water retaining function.