To solve the problems in existing rotational measuring methods such as the limits of dynamic measuring range,the requirement of extra load on the rolling shaft,which influences the rotation and accuracy,a rotational velocity transducer based on linear CCD is presented.Rotation of the measured shaft is transformed into translation through reflection of the specially designed strip on the shaft.By making use of CCD’s superior capacity in micro-displacement detection and employing high sensitive PIN diode as a flag of position,the measuring system is proposed with good real-time capacity in non-contact measurement of low to high speed.Experimental results demonstrate a good linearity of 1.6%,a relative error of 0.59% on average and a resolution of 0.86 r/min within the measuring range of 0-8 000 r/min.