The present invention provides a multi-unit rotary system and method for storage, intelligent sorting and picking of express parcels. Through adoption of layered design of a rotary storage unit, different sizes of parcels are stored in a sorting manner, thereby effectively increasing the utilization rate of the storage space; besides, due to the storage design of the subunits, arrangement of storage units of the system is more flexible, and the number of rotary storage unit subunits can be set freely according to the requirements for site space and the storage capacity for express parcels; through adoption of overall unit combination design of the present invention, the mounting, the layout and the maintenance of the system are more convenient, and during the operation of the system, automatic sorting and storage of the express parcels are achieved.