The utility model discloses a shaft central line elevating gear, including shaft and central line, shaft well head department covers and is equipped with the apron, and the apron middle part is equipped with the first round hole that supplies the central line to pass through, is fixed with the sheet metal on the apron, the center department of sheet metal is equipped with the second round hole that supplies the central line to pass through, be fixed with first support on the sheet metal, rotate on the first support and be connected with first fixed pulley, the shaft is other to be provided with the base, installs the cylinder on the base, and the one end of cylinder is connected with the motor, installs the second support on the base, rotates on the second support and is connected with the second fixed pulley, central line one end is fixed and twine on the cylinder, after second fixed pulley and first fixed pulley are walked around to the central line other end, vertically passes second round hole and first round hole downwards and stretches into the shaft. The utility model discloses strengthen the degree of accuracy of central line, reduced the loss of central line, prolonged the life of central line to greatly increase the hoist speed of shaft central line, thereby improved engineering quality, speeding up the work.