Based on the achromatic principle of composite wave plate and diffraction-limited theory of the tight focusing of the vectorial field, a pupil filter is presented for the focusing of the broadband vectorial field with the central wavelength of 600 nm. This filter is combined of three segmented wave plates, each of which is divided into four concentric belts with optimized radial parameters and azimuth angle. The optical axis of the two adjacent belts is vertical. For the incident vectorial beam with wavelength from 550 nm to 650 nm, the desired specially focused field with extended depth of focus, such as optical needle field with compressed radial width and diffraction-limited tube filed, can be achieved. The result shows that this filter can be effectively used as an effective manipulator for the vector beam with wide waveband in the 100 nm band. This achromatic pupil filer will be beneficial for the development of the focusing theory and applied technology about the wideband vectorial field.