The work efficiency of modern NC machining is improved greatly by the help of onmachine measurement technology, where the whole process from part machining to measurement can be accomplished only at once positioning and clamping. However, a new technical challenge was encountered when a substandard part was detected and need to be machined again on onmachine measurement. Onmachine measurement software with autorepairmachining function was developed for parts with regular features. The framework of onmachine measurement software with autorepairmachining function was presented, and an auto repair method for holemachining errors is proposed based on reverse compensation method. The developed onmachine measurement software was implemented in Visual C++ and a cylindrical bore was presented for verification.