Abstract: Abstract: Developmental dyscalculia (DD), as a specific type of learning disabilities, has pervasive effects on children’s mathematical achievement and perception of mathematical learning. It has become a focus of many research disciplines during recent years. This article reviewed current progress in numerical and arithmetical cognition in DD, explored some issues as followed, the performance and characteristics of numerical and arithmetical cognition in DD, the cognition performance of subtypes, general cognition deficit and numerical processing module deficit as possible causes for DD. It’s suggested future research topics are to examine the complicated relationships between different numerical and arithmetical cognitive deficits, the characteristics of subtypes, and the interactions and mechanisms between possible causes

Key words: developmental dyscalculia (DD), numerical and arithmetical cognition, subtype, cause