The utility model discloses a concrete splitting strength test device in an ultra low temperature environment. The concrete splitting strength test device comprises a universal tester and a lower temperature box which is arranged between the upper and lower pressing plates of the universal tester, wherein holes used for an upper force transmission rod and a lower force transmission rod to penetrate are formed in the surface of the low temperature box; one end of the upper force transmission rod is connected with the upper pressing plate of the universal tester; the other end of the upper force transmission rod is connected with an upper pressure bearing disc which is clamped above a concrete test block; an upper gasket is connected between the upper pressure bearing disc and the concrete test block; one end of the lower force transmission rod is connected with the lower pressing plate of the universal tester; the other end of the lower force transmission rod is connected with an lower pressure bearing disc which is clamped below the concrete test block; an lower gasket is connected between the lower pressure bearing disc and the concrete test block and the upper pressure bearing disc, the upper gasket and the lower gasket are connected through two positioning rods. The concrete splitting strength test device disclosed by the utility model is good in integrity, simple in structure and testing method, convenient to dismount and easy to operate and implement and can be widely applied to concrete splitting strength test in the ultra low temperature environment; the efficiency and test accuracy are also guaranteed.