A man accused of locking a young boy in a 'cage' at a Perth supermarket has pleaded not guilty to two charges in Armadale Court.

Farivar Ronaghi, 41, was charged with deprivation of liberty and common assault after a December 30 incident at the Kelmscott IGA in which he allegedly injured a boy who reportedly tried to steal a bottle of Coke.

Mr Rongahi, from Karrinyup, is also alleged to have locked the boy in a storeroom at the supermarket.

He was bailed to reappear on May 28.