This study mainly explored psychological stress caused by the COVID-19 among parents in developmental disabilities and how it was related to parents' views of school success in mainland China. The Psychological Stress Questionnaire and Views of Social and Academic Success were administered to 1919 parents of children with developmental disabilities. Results showed that parent characteristics including gender, age, educational level, family income and job nature and children characteristics (i.e., disability types) were related to psychological stress caused by the COVID-19, and that psychological stress caused by the COVID-19 significantly negatively predicted parents' views of school success. The contributions, limitations, and implications of the present research are discussed.