Spacer grid for strengthening stirring and mixing performance and fuel assembly

The invention belongs to the technical field of nuclear fuel assemblies, and particularly discloses a positioning grillwork for strengthening stirring and mixing performance and a fuel assembly, and the positioning grillwork comprises stirring and mixing wings arranged at the top ends of inner strips; the stirring and mixing wing is formed by bending N times, the side face of the stirring and mixing wing is in an S shape, and N is a positive integer larger than or equal to 2. The stirring and mixing wings are designed to be formed through multiple times of bending, axial fluid is transversely guided for the first time, the middles of the stirring and mixing wings are bent for the second time, the fluid is further transversely guided, and the stirring and mixing effect is enhanced. According to the invention, the distance between the stirring and mixing wings and the clamping mechanism is increased, which is beneficial for reducing the disorder degree when fluid reaches the stirring and mixing wings, so that t