The invention discloses a classified positioning method for planar positions of goods packages of a warehouse on the basis of a mobile RFID reader. The method comprises the following steps: enabling the vehicle-mounted mobile RFID reader to move in a passage in the warehouse, and reading data information of radio frequency identification tags in the goods packages in the whole warehouse; initially positioning the goods packages; taking goods package data with high confidence coefficient in an initially positioned result as data information of a reference position; matching the information of the goods package data with low confidence coefficient in the initially positioned result with an extracted characteristic curve; and taking a position corresponding to the characteristic curve with high matching degree as a final position of the goods package with low confidence coefficient in the initially positioned result. The workload of arrangement of readers is reduced, and meanwhile, costs are saved; fingerprint information of various positions in the warehouse does not need to be acquired in advance, so that the method has portability; and on the basis of classified positioning, the advantage of fingerprint recognition positioning is fully utilized, and high positioning accuracy is realized under the condition of portability and workload reduction.