把命令方块放在地上（废话）然后打开输入这个/give @p minecraft:diamond_sword 1 0 {AttributeModifiers:[{Operation:0,UUIDLeast:1,UUIDMost:1,Amount:100.0,AttributeName:generic.attackDamage,Name:Attack}]}那个大括号是nbt标签，里面的Amount:里的数字是伤害值（要精确