The invention relates to a tuberous root crop harvester. The tuberous root crop harvester comprises a rack, a digging shovel and a collecting box, wherein the digging shovel is installed at the front end of the rack through a digging shovel supporting plate. The tuberous root crop harvester is characterized in that the tuberous root crop harvester further comprises a soil removing device, a scraper elevator, a transverse conveying belt and a root cutting device; the digging shovel, the soil removing device, the scraper elevator and the transverse conveying belt are arranged on one side of the rack from front to rear, and the root cutting device and the collecting box are arranged on the other side of the rack from front to rear; the digging shovel supporting plate is connected with the soil removing device through a bridge and the transverse conveying belt is transversely connected with the root cutting device. The harvester is suitable for tuberous crops such as onions and garlics, can realize digging, soil removing and root cutting functions, adapts to the characteristics of the tuberous root crops, solves the problem of segmental operation of harvesting, soil removal and root cutting at present, realizes combine harvesting, can complete operation processes needed after the tuberous root crops are harvested, and improves the harvesting efficiency.