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 labeling 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; 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; and a reload switching unit for, under a set condition, switching the apparatus to a restart path and then switching back to a cycled operation path and executing all of the field motion detection unit, the motion block detection unit, the expanding block unit, the delay unit, the AND processing unit, the inverse telecine unit, and the deinterlace unit.