The fully automatic bottle capping machine is suitable for automatic capping of bottles with capacity ranges from 1L to 5L, it consist of lid unscramble, lid feeder, lid pressing system, as well as motion mechanism, conveying system and control system. Compared to ordinary capping machine that needs to be paused during the process for preventing the material from splashing out of the bottle, this bottle capping machine can implement the lid pressing process continuously and automatically.