1. An apparatus for detecting video film with mix mode, comprising: a field motion detection unit, receiving a current field image and at least an adjacent field image so as to detect out a field motion value of each pixel; a motion block detection unit, dividing an image into a plurality of un-overlaid blocks, receiving the field motion value of the current field image or the field motion value of a fed back last field image so as to detect out the motion state of each block and labelling as a motion block; an expanding block unit, expanding the motion block into an expanded motion block; a delay unit, delaying the received current field image by a predetermined time and then outputting the delayed current field image to the expanding block unit to become a last field image relative to the next current field image; an AND processing unit, taking at least a pixel as an intersection area, performing an AND processing on the current field image with the motion block and the last field image with the expanded motion block to obtain a confirmed motion block and assigning a motion intensity value to the intersection area according to the field motion value; an inverse telecine unit, deciding an inverse telecine mode after excluding the confirmed motion block according to the motion intensity value and the continuously input current field image; and a deinterlace unit, recovering the continuously input current field image into a video image according to the inverse telecine mode, wherein the deinterlace unit further recovers the image content of the confirmed motion block with a weighted inverse telecine mode according to the motion intensity value.