The invention discloses an intelligent correction method for the posture of a vehicle body of a heavy rail type petroleum special pipe conveying vehicle, and can solve the problems that in the transverse conveying process of an existing conveying vehicle, the length direction of the vehicle body cannot be kept perpendicular to the length direction of a rail, so that the conveying vehicle is difficult to be in butt joint with other equipment, and goods taking and placing at a target station are affected. A laser receiver, a laser emitter and a control system are provided, wherein the laser receiver is arranged on one side of the conveying vehicle body, the laser emitter is arranged at the end of the rail system and fixed to the ground, and the control system is used for intelligently controlling and adjusting the posture of a vehicle body. The laser receiver and the laser emitter are in communication connection with the control system. Through the double-insurance correction method in which a calibration system composed of a sensor and a ground induction plate serves as an absolute calibration mode and is more direct and reliable than an analog signal measured by laser, it can be guaranteed that the vehicle body posture of the conveying vehicle is always in a controlled state in the operation and station butt joint process, and various risks caused by vehicle body inclination are avoided.