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Introduction:The s tudy of individual differences in information processing in order to predict the academic achievement of s tudents with math disability is of great importance.The purpose of this s tudy was to s tudy automatic and controlled data processing speed based on the Stroop tes t in s tudents with math learning disability. Materials and Methods: This descriptive s tudy was causal-comparative. The s tudy population consis ted of s tudents in dis trict 6 education in Tehran city. The sample consis ted of 36 s tudents with and without learning disability in mathematics (18 s tudents with Math Learning Disability and 18 normal s tudents), selected by sys tematic random sampling from the lis t of s tatis tical populations (specific learning problems center) and matching method (normal group).The data were collected by demographic ques tionnaire, Raven's Progressive Matrices, Keymaths math tes t and Stroop tes t and analyzed by multivariate analysis of co-variance, Shapiro-Wilk tes t, Box and Levin tes ts. Results: The findings showed that automatic and controlled information processing in s tudents with and without a math learning disability are significantly different. The mean of reaction time and number of errors in s tudents with math learning disability is significantly higher than s tudents without learning disability is math. Conclusion: According to the results of this s tudy the speed of automatic and controlled information processing in s tudents with math learning disability is weak (low) and educators should pay attention to this problem.