A direct input push-pull force monitoring method with rotary pull-press force sensors was proposed. It was analyzed how the centrifugal force affecting the error the rotary pull-press force sensors. An algorithm was disclosed to compensate the error from the expansion under the centrifugal force. The rotary pull-press force sensor was used to monitor the input force of the power chuck in the experiment. It monitored the variation of the input push-pull force of the power chuck well. The direct monitoring of the input push-pull force was more reliable than the indirect monitoring of the oil pressure. The input push-pull force sensor was more difficult to be polluted by the cooling water and scrap iron.