Abstract: Addressing the problem that during steel tube straightening operation，roll wearing causes deviation of the process setup parameters like roll gap and bending deflection，etc.，based on the result of detection of such process parameter deviation as made during steel tube automatic straightening operation by a certain company，specific plan for deviation compensation is studied and then，relevant adjustment measures against the undesirable tube straightening quality are determined.Relevant actual operation result indicates that thanks to straightening with the well-adjusted bending deflection and roll gap，it is practical to turn the original multi-step straightening operation into a one-step straightening operation.