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The positioning accuracy detection system of traditional blind guide robots has low detection accuracy and positioning accuracy. In order to solve the above problems, a new positioning accuracy detection system for blind guide robots was designed based on the MDH model. The system hardware processed it and divided it into positioning signal acquisition module, sensing module and accuracy detection module for system design operation. KX was selected -8295W intelligent data collector to realize data positioning, select S18-2VNDL-2M sensor for data sensing operation, use T1500X22110-P1500450GD laser transmitter to output visible light, and perform accurate data position analysis according to the angle of light refraction to find the theory The type data position is positioning data. The data communication application, filter processing application and data transmission and detection application are designed respectively. In order to verify the effectiveness of the system, a comparative experiment is set up. The results show that compared with the traditional system, the detection accuracy of the positioning accuracy detection system of a blind guide robot based on the MDH model is increased by 15.21%, and the positioning accuracy is increased by 22.34%.