Method for automatic straightening correction of elongated metal elements, in particular metal rods, comprising the phase of: a. supplying a first said element along a first supply line on a worktop, through a straightening unit acting along said first supply line, thus carrying out the straightening of said first element, characterised in that it comprises the further phases of: b. detecting by means of a detection group (10, 100) arranged downstream of said straightening unit and suitable for detecting at least at one transverse detection plane to said first supply line the instantaneous position of sections of said first element moving in said supply phase, in order to process by means of processing means the configuration actually taken by said first element supplied and straightened along said first supply line; c. adjusting, at any time subsequent to said detection phase b.), said straightening unit depending on a possible deviation of said configuration actually taken, processed for said first straightened element, by a desired straightened configuration; d. suspending the supply of said first element; e. supplying through said straightening unit a second element along a second supply line flanked, with respect to a transverse direction to said worktop, to said first supply line in a substantially parallel manner, thus carrying out the straightening of said second element; f. detecting by means of said detection group (10, 100) suitable for detecting at least, at one respective detection transverse plane to said second supply line, the instantaneous position of sections of said second element moving during said supply phase, in order to process by means of processing means a respective configuration actually taken by said second element supplied and straightened along said second supply line; g. adjusting, at any time subsequent to said detecting phase f.), said straightening unit depending on a possible respective displacement of said respective configuration actually taken, processed for said second straightened element, by a respective desired straightened configuration; h. resuming the supply of said first element and/or said second element, respectively, along said first supply line and/or said second supply line, to continue the straightening and/or perform the subsequent machining. a. supplying a first said element along a first supply line on a worktop, through a straightening unit acting along said first supply line, thus carrying out the straightening of said first element, characterised in that it comprises the further phases of: b. detecting by means of a detection group (10, 100) arranged downstream of said straightening unit and suitable for detecting at least at one transverse detection plane to said first supply line the instantaneous position of sections of said first element moving in said supply phase, in order to process by means of processing means the configuration actually taken by said first element supplied and straightened along said first supply line; c. adjusting, at any time subsequent to said detection phase b.), said straightening unit depending on a possible deviation of said configuration actually taken, processed for said first straightened element, by a desired straightened configuration; d. suspending the supply of said first element; e. supplying through said straightening unit a second element along a second supply line flanked, with respect to a transverse direction to said worktop, to said first supply line in a substantially parallel manner, thus carrying out the straightening of said second element; f. detecting by means of said detection group (10, 100) suitable for detecting at least, at one respective detection transverse plane to said second supply line, the instantaneous position of sections of said second element moving during said supply phase, in order to process by means of processing means a respective configuration actually taken by said second element supplied and straightened along said second supply line; g. adjusting, at any time subsequent to said detecting phase f.), said straightening unit depending on a possible respective displacement of said respective configuration actually taken, processed for said second straightened element, by a respective desired straightened configuration; h. resuming the supply of said first element and/or said second element, respectively, along said first supply line and/or said second supply line, to continue the straightening and/or perform the subsequent machining.