Spacer grid for fuel assembly and fuel assembly

The embodiment of the invention provides a positioning grillwork for a fuel assembly, which comprises a plurality of lattice cells, the lattice cells are arranged in an array, two adjacent lattice cells are connected with each other, so that the plurality of lattice cells form a regular polygon lattice cell group, each lattice cell comprises a lattice cell body which is constructed into a hollow cylinder with an approximately circular section, and a plurality of lattice cells are arranged in the lattice cell body; a fuel rod is allowed to be inserted into the lattice cell body, and a first plane extending in the vertical direction is formed at the position where the side wall of the lattice cell body is connected with other adjacent lattice cell bodies; the bulges are sequentially formed on the inner wall of the lattice cell body in the circumferential direction so as to clamp a fuel rod placed in the lattice cell body; and the outer strip is bundled at the outer part of the lattice element group. The embodim