The invention discloses a storage and transfer system for long and heavy assemblies. The storage and transfer system comprises a turning device, a plurality of storage devices and a transfer device. The turning device comprises a frame body, a base and a turning structure, wherein the frame body is used for storing the long and heavy assemblies and turns under the effect of the turning structure, and the bottoms of the long and heavy assemblies are supported on the base. Each storage device comprises a pedestal and a leaning frame, wherein the pedestal is used for bearing the heavy end of the corresponding long and heavy assembly, and the corresponding long and heavy assembly leans against the leaning frame and is supported by the leaning frame. The transfer device moves between the storage devices and the turning device and used for transferring the long and heavy assemblies between the turning device and the storage devices. According to the storage and transfer system for the long and heavy assemblies, the long and heavy assemblies are turned through the turning device, stored through the storage devices and transferred between the turning device and the storage devices through the transfer device, so that the long and heavy assembles are convenient to take and store, and the efficiency is high; in addition, since the transfer device can move to each storage device, the long and heavy assembles can be taken and stored out of order, the space can be used reasonably, and the long and heavy assemblies are prevented from being stored for a too long time.