Machine tool tailstock following mechanism

The utility model relates to a machine tool tailstock following mechanism, in particular to a following mechanism arranged between a numerical control machine tool tailstock body and a cross carriage. The machine tool tailstock following mechanism comprises a tailstock body (2), an installing seat (3) and a pin shaft (4), wherein the tailstock body (2) is installed on a guide rail placed on one lateral side of a machine tool; the installing seat (3) is fixed on the tailstock body (2); a moving pair with a first limiting position and a second limiting position is formed by a journal of the pin shaft (4) and through holes on the installing seat (3); when the machine tool tailstock following mechanism is at the first limiting position, the front end of the pin shaft (4) is inserted into an unthreaded hole of the cross carriage (1) placed on a guide rail which is positioned on the other side of the machine tool; when the machine tool tailstock following mechanism is at the second limiting position, the front end