Preheat the air fryer to 400°F (204°C).
Clean then cut off the bottom (2"-3") of the asparagus.
Place flour in a shallow dish/plate.
In a separate shallow dish; combine grated parmesan cheese and Italian breadcrumbs together.
In a separate shallow dish; add egg and whisk.
In this order: Coat the asparagus by rolling in the flour, egg and then cover all over with the Parmesan mixture. Transfer the air fryer. Depending on the size of your air fryer, you may need to do in batches. Continue with the rest of the asparagus.
Air fry for 8-10 minutes or until golden brown (make sure to flip half way).