A double-headed arrow type negative poisson ratio structural body relates to the structural body field of space lattice structures, and includes a double-headed arrow type negative poisson ratio structural unit, wherein the double-headed arrow type negative poisson ratio structural unit includes an upper cross beam, a lower cross beam, a first upper diagonal bar, a second upper diagonal bar, a first lower diagonal bar, a second lower diagonal bar, a first middle diagonal bar and a second middle diagonal bar; a first upper connecting base, a second upper connecting base, a first lower connecting base and a second lower connecting base are respectively arranged at the lower ends of the first upper diagonal bar, the second upper diagonal bar, the first lower diagonal bar and the second lowerdiagonal bar, so as to form the double-headed arrow type negative poisson ratio structural unit; in space, the double-headed arrow type negative poisson ratio structural unit adopt the first upper connecting base, the second upper connecting base, the first lower connecting base, the second lower connecting base, the upper cross beam and the lower cross beam as connecting pieces for combined connection to form the double-headed arrow type negative poisson ratio structural body with the stereostructure. The double-headed arrow type negative poisson ratio structural body has the advantages of simple structure, high stability, light weight in unit space, high compression resistance, high impact resistance, and the like.