Reading comprehension and arithmetic skills are essential abilities for children, particularly at the early career. Examine the link between language proficiency and numeral information process amongst primary school children. This study examines numeral comprehension in 600 Chinese primary second graders with different levels of decoding and linguistic comprehension skills. Four groups of children were compared, including typical readers (TR), poor decoders (PD), poor comprehenders (PC) and general poor readers (GPR). Results showed that the four groups had similar performances in numeral comprehension when the answer options to a question on the quantity of numerals were presented in Arabic numbers. However, when the answer options to a question on the quantity of numeral information were presented in analogue nonsymbolic magnitude representations, the PC group outperformed the PD and GPR group. The findings of this study has demonstrated the link between language proficiency and numerical information process in reading comprehension.