Blender model is in ue4 "destroyed"

So i did a little Model in Blender for my NPC. I did the Bones and all that stuff u should do. But if i am import the model in ue4, when it is destroyed. Can someone help me pls?

Blender:

ue4:

Is your model imported as a FBX? If not then you got to make sure it is. FBX is very important when importing 3d models?