The skeletal mesh body collides with the model in the scene

n 5.4, the characters in the display project push the objects in the scene to fall down. May I ask how to realize the collision between the bones and the objects in the scene

A skeletal mesh will have a physics asset associated with it. Open the skeletal mesh and in the upper right corner of the window there will be a button. This will open up Physics Asset which will allow you to add collision.

For more details, you can search for the Physics Asset tutorial

Also, for objects you want to interact with, you need to enable the “Simulate Physics” checkbox.