Composite craniocerebral operation localizer

The utility model relates to a composite craniocerebral operation localizer, which belongs to medical appliances and consists of a tapeline, a ruler and a circular rolling scale. The tapeline is arranged in an outer casing, one end of the ruler is connected to a tapeline casing while the other end is connected with the circular rolling scale, wherein the tapeline casing is fixedly connected with the ruler, and the circular rolling scale is connected with the ruler through a pin shaft. The composite craniocerebral operation localizer is simple and compact in structure and convenient in use, the tapeline can be used for measuring actual craniocerebral surface curved distance, the ruler can be used for measuring linear distances of craniocerebral CT and MRI images and craniocerebral surfaces, and the circular rolling scale is mainly used for measuring arc distances of the craniocerebral CT and MRI images. According to plotting scale, measured distances of the craniocerebral CT or MRI images can be converted into