使用盔甲架拿着物品然后修改Pose

/summon ArmorStand ~ ~0.7 ~ {Equipment:[{id:"minecraft:物品名"},{},{},{},{}],Pose:{Body:[0.0F,0.0F,0.0F],LeftArm:[0.0F,0.0F,0.0F],RightArm:[0.0F,0.0F,0.0F],LeftLeg:[270.0F,0.0F,0.0F],RightLeg:[270.0F,0.0F,0.0F],Head:[0.0F,0.0F,0.0F]},NoGravity:1b,NoBasePlate:1b,Invisible:1b,DisabledSlots:2069869,ShowArms:0b,Small:0b}
详见贰逼的教程贴

http://www.mcbbs.net/thread-339021-1-1.html 这个不适用吗

你那个用不了。

1.12的话
/summon armor_stand ~ ~0.7 ~ {HandItems:[0:{id:"物品名",Damage:0s,Count:1b,tag:{}},1:{}],Pose:{Body:[0.0F,0.0F,0.0F],LeftArm:[0.0F,0.0F,0.0F],RightArm:[0.0F,0.0F,0.0F],LeftLeg:[270.0F,0.0F,0.0F],RightLeg:[270.0F,0.0F,0.0F],Head:[0.0F,0.0F,0.0F]},NoGravity:1b,NoBasePlate:1b,Invisible:1b,DisabledSlots:2069869,ShowArms:0b,Small:0b}

请注意：
物品名替换成minecraft:物品名
比如id:"minecraft:stone"

你这个用不了，在命令方块里输入你这个指令，命令方块显示数据标签解析失败。