The utility model relates to a long shaft-like synchronous follower for a milling machine. The long shaft-like synchronous follower for the milling machine comprises a bottom rail arranged on the ground, synchronous wheels walking on the bottom rail, a support seat arranged on the synchronous wheels and a guide idler wheel rotationally arranged above the support seat. Compared with the prior art, the long shaft-like synchronous follower for the milling machine has the following advantages: the rotatable guide idler wheel is arranged above the support seat and the synchronous wheels are arranged at the bottom of the support seat to walk on the bottom rail, so when being machined, a long shaft to be machined can be erected between a machining platform and the guide idler wheel of the milling machine, the disadvantage that the long shaft is hoisted by adopting a crane traditionally is solved, the structure is simple, the cost is low, and the machining precision is improved.