Objective To investigate the characteristics and risk factors of intelligence development in children with delayed language development,in order to provide scientific evidence for early clinical diagnosis,intervention and treatment of language delay. Method A total of 209 children aged 1~5 years (including 164 boys and 45 girls) with main complaints of language delay were recruited in Wuhan Tongji Hospital from June 2016 to July 2017,of which 35 were diagnosed with developmental language delay,and 174 were diagnosed with global developmental delay(GDD).All participants were assessed with the Gesell Developmental Scale,the Early Language Development Screening Scale (Shanghai standardized edition) and self-designed demographic questionnaire to obtain relevant information. Results No significant differences were found on gender,father′s educational level,father′s occupation,parental relationship,temperament type,main caregivers,daily time spent with main caregivers,and daily screen time between children with developmental language delay and GDD children (all P>0.05).However,there were significant differences on children′s age(χ²=12.723),mother′s educational level(χ²=10.124),mother′s occupation(χ²=7.473)between two groups(all P<0.05).Multifactor regression analysis showed that children with less-educated mothers were 5 times more likely to develop GDD than those with more educated mothers (OR=5.419,P<0.01). Conclusions Language screening is badly needed in children′s routine physical examination in order to make early identification of developmental language delay.Besides,health education from medical professionals is suggested to be conducted in less-educated mothers,so as to reduce the potential adverse impacts of language delay on children′s overall development.