Underwater horizontal manifold connector mounting tool

The utility model relates to the technical field of oil and gas drilling, in particular to an underwater horizontal manifold connector installation tool. The device is characterized in that the device is used for mounting an underwater horizontal connector to realize locking and unlocking of the connector. The installation tool adopts a four-stand-column mechanical guiding structure to achieve synchronism of stretching and retracting of multiple hydraulic cylinders, the secondary locking device adopts a mechanical locking wrench mechanism to improve operation efficiency and reliability, and the installation tool installation butt joint guiding device adopts a horn mouth and a V-shaped positioning column for guiding to achieve smooth lowering of the installation tool in place. The device mainly comprises a lifting device, a guide column, a butt joint hydraulic cylinder, a rear plate assembly, a secondary locking device, a butt joint plate assembly, a driving hydraulic cylinder, a driving plate assembly, a fron