The invention discloses an energy-saving environment-friendly lime furnace. The furnace comprises a furnace body,a feeding port is formed in the top of the furnace body,a separation plate is arrangedin the furnace body,the inner part of the furnace body is separated into a burning chamber and an ash storage chamber by the separation plate,a heat preserving layer is arranged on the inner wall of the burning chamber,a discharging port is formed in the middle of the separation plate,supporting frames are symmetrically arranged two sides of the top of the interior of the ash storage chamber,a base is arranged at the bottom end between the supporting frames on two sides,a supporting plate is arranged on the top of the base,a first sliding groove is formed in the middle of the supporting plate,a sliding column fitting the first sliding groove is arranged in the first sliding groove,a fixing plate is arranged on one side edge of the top end of the sliding column,a supporting rod is arrangedon the top end of the side,away from the sliding column,of the fixing plate,a moving column is arranged on the end,away from the fixing plate,of the supporting rod,a connecting plate is arranged on the end,away from the supporting rod,of the moving column,the side edge,away from the supporting rod,of the connecting plate is connected with the top ends of the supporting frames,cylinders are arranged on the top ends of the supporting frames,first motors are arranged on the side edges,away from the connecting plate,of the cylinders,and first rotary shafts are arranged on the side edges,close to the cylinders,of the first motors.