The invention discloses an automatic production line for straightening shaft parts. The automatic production line comprises a straightening machine, a center hole grinding device, a rotary translationdevice arranged between the center hole grinding device and the straightening machine and used for horizontally transferring the shaft parts between the straightening machine and the center hole grinding device, a shaft part conveying system used for conveying the shaft parts between a feeding port and the center hole grinding device, and a control device connected with the straightening machine,the center hole grinding device, the rotary translation device and the shaft part conveying system. Under the control effect of the control device, the shaft parts are horizontally transferred to therotary translation device through the shaft part conveying system; and the shaft parts are sequentially subjected to center hole grinding and straightening through the rotary translation device, manual participation is not needed in the whole process, and the automatic production line for straightening the shaft parts better improves the automation degree of the shaft part straightening process.