The utility model discloses a blowout preventer stack pressure testing connecting device of eccentric hanger oil recovery well can satisfy current oil field well control technical requirement, for wellhead blowout preventer organizes the pressure testing, can circulate after the blowout preventer stack pressure testing is qualified and wash the construction of kill -job construction and the eccentric hanger of large -tonnage proposition. This pressure testing connecting device includes pressure testing oil pipe, and the pressure testing nipple joint is equipped with the pressure testing mouth,with coupling and pressure testing nipple joint, elbow no. 1, compensator, elbow no. 2 with be connected nipple joint threaded connection in proper order, and the upper portion threaded connection ofpressure testing oil pipe and coupling. This connecting device installation, dismantle simple swiftly, the bearing tonnage is big, and withstand voltage grade is high, has made things convenient foreccentric hanger well blowout preventer stack's pressure testing construction greatly, is showing the pressure testing efficiency of construction that has improved blowout preventer stack, is also showing the construction that the circulation that has made things convenient for eccentric hanger well was washed the kill -job construction and was risen to out former well casing post simultaneously,has apparent result of use.