The invention discloses a low tin-zirconium alloy material for a nuclear reactor fuel assembly. Based on the total weight of the low tin-zirconium alloy material, the low tin-zirconium alloy material consists of 0.8 to 1.0 percent of Nb, 0.2 to 0.5 percent of Sn, 0.2 to 0.5 percent of Fe, 0.06 to 0.14 percent of O, 0.05 to 0.1 percent of Cu, 0.09 to 0.2 percent of Cr or V and the balance of Zr, wherein the weight percentage sum of Sn and Fe is 0.6 to 1.0 percent. Discovered by a large amount of experimental research, when the weight percentage sum of the Sn and the Fe in the zirconium alloy is controlled in a certain range, the specific amount of added Cr or V can greatly reduce the corrosion at the alloy seams, so that safety, cost and efficiency of the high nuclear fuel assembly can be improved, wherein the V can improve the mechanical property of the alloy; and the specific amount of added Cu is favorable for further improving the corrosion resistance of the alloy.