The invention relates to a novel Chinese cabbage combine harvester. The harvester comprises a traction device and a rack installed on the traction device, a conveying mechanism, a guiding mechanism and a root cutting mechanism are installed on the rack, the conveying mechanism comprises a group of vertically arranged front-mounted belt conveyors and a rear-mounted belt conveyor, passages are reserved between the front-mounted belt conveyors, the root cutting mechanism is arranged on the lower portion of the passages and fixedly connected with the rack, the guiding mechanism fixedly connected with the rack is arranged on the lower portions of the front ends of the front-mounted belt conveyors, the traction device drives the guiding mechanism arranged on the rack to collect Chinese cabbages to the root cutting mechanism, the root cutting mechanism clamps roots by means of the front-mounted belt conveyors while cutting the roots, and the roots are conveyed to the rear-mounted belt conveyor to be threshed and harvested. The harvester has the advantages that the Chinese cabbages are harvested through integrated automatic equipment instead of manual work, the manpower is saved, the labor intensity is lowered, and meanwhile the Chinese cabbage harvesting efficiency is improved, the harvesting cost is lowered, and the wide application and popularization value is achieved.