The invention discloses a BOP (blowout preventer) storage and transportation device for a deep sea float type drilling well. The BOP storage and transportation device comprises a basal body, which is formed by welding two side box type beams with a rear end box type beam. The basal body is provided with a space for accommodating a BOP, a driving device and a guide device are arranged on the basal body, the guide device comprises a guide rail arranged on the deck of a vessel body, and the basal body is provided with a pressure test device; and according to the BOP storage and transportation device, the BOP can be stored through the movable basal body, compared with the method that the arrangement of a fixed BOP storage zone on the deck is required for storing the BOP in the prior art, a BOP storage position is more flexible, during the working processes of well drilling waiting, towing and the like without the participation of the BOP, if the BOP stored on the deck intervenes the arrangement of other devices, the position of the basal body can be conveniently adjusted, a fixed occupied area is saved for the deck, and a larger and more flexible designing area is provided for the deck.