How to Replace a Model with Other Model in Blender

Instead of replacing multiple objects one by one, you can just simply use the Link Object Data action.

Prerequisites for Replacing Objects

First, you should make sure that the objects you want to replace are all separate objects. Also the pivot points should be in the same location as in the object you will replace them with. To keep the rotation of the objects the same, make sure you don’t apply the rotation.

Replacing the Other Objects with a New Object

Hold down SHIFT and select all the objects you want to replace, then lastly, select the new object. This object should have a yellow outline.

Press CTRL + L and choose Link Object Data.