This restaurant up by the main entrance to Mùtiányù Great Wall serves family-style Chinese food. Inexpensive, considering the location.
One of the few restaurants by the west gate of Jīnshānlǐng Great Wall that stays open in winter. It has an English menu.
Just up from the east car park at Bādálǐng, this place does OK dumplings, as well as rice and noodle dishes. It has a picture menu, so you can point and pick.
Just up from the west car park, between a KFC and a Subway, try Yong He King for the Chinese version of fast food: rice meals, dumplings, noodles.