or the bad working environment of the subsea collect connectors, lots of external interference factors and being subject to tension, compression, bending, twisting or other external forces, the model of connector has been built. Various stress states were analyzed, and method of calculating maximum bearing capacity was proposed under all the states of connectors. The bearing capacity of tension of the connector was analyzed by the determination of dangerous cross section and elongation of the collect. The bearing capacity of compression was depended on the reserved distance of two flanges, and was analyzed by calculating the largest amount of compression of the collect. The bearing capacity of bending moment was pivoted to the force of the collect which was furthest from the center line of flange, and was analyzed according to the theory of overturning moment. The bearing capacity of torque was depended on the friction force between flange and collect, and it was different in different working conditions according to the change of the normal force that from collect to flange. The method of analysis of bearing capacity by analyzing the stress state of connector is a good reference for development of domestic similar subsea mechanical connectors.