According to Feng Shui, the head of the bed should not face the bedroom door. So can soft partitions be used? Such as cloth curtains or bead curtains?

You are right. In Feng Shui, the head of the bed should not face the bedroom door. This is called rushing against the door, and it is easy to suffer from headaches and other symptoms.

You also know that it can be solved by just having a partition between the door and the bedside. This is also correct.

But the material used for partitioning must not be translucent, so bead curtains are the least effective.

It is okay to use curtains, but they must be thick and opaque.