Intelligent Inspection Robot for Rail, Adopting advanced ultrasonic detection technology, image pattern recognition technology, gyro angle measurement technology and RFID passive tag technology, Through 'Ultrasonic Rail Flaw Detection System', 'Track Bed Inspection System' and 'Track Detection System' (3 + N), surface cracks, fastener missing and breaking, sleeper cracks, track static geometric parameters, etc. are automatically detected, and over-limit defects are automatically located, feature extracted and automatically alarmed. The detection results can be transmitted back to the background terminal in real time through 4G/5G network. Other subsystems can be combined and equipped according to actual requirements, which can effectively replace the flaw detection operation of the existing hand-pushed rail flaw detector. It is suitable for automatic detection of various infrastructure works lines in the field of urban rail transit.