The convergent efficiency of computer-controlled optical surfacing (CCOS) relates to many factors such as algorithm, parameter settings, tool and abrasive. A kind of local deconvolution algorithm with high efficiency is put forward, firstly plotting the error figure to manufacturing area and non-manufacturing area, and programming the manufacturing trace in each manufacturing area, then doing deconvolution in local area along the manufacturing path, thus getting the dwell time of the tool in each area, lastly according the nearest point criterion to switch from one manufacturing area to the other. The ratio of the efficient manufacturing time to the total running time of the tool is raised greatly, so the whole manufacturing efficiency is increased, and the mid-frequency error is restricted to some extent.