The utility model relates to a testing system of oily handstand formula CT end screen imperfect earth trouble of simulation. Its characteristics are: including sleeve pipe (5), install electric capacity screen (6) in this sleeve pipe (5), install in proper order at this sleeve pipe (5) top and store up oil tank (4), inflation ware (1), and install base (8) in this sleeve pipe (5) bottom, install the end screen ground terminal (9) who is connected with aforementioned electric capacity screen (6) end screen (7) electricity in this base (8), this end is shielded ground terminal (9) and is connected with grounded bolt on the base (8) through discharge ball crack (10). The utility model discloses a testing system can be used to the developing process and the discharge pulse characteristic of this type of trouble of this equipment of research in the high voltage system. Through the collection and the analysis discharge pulse characteristic in laboratory, the defect that can determine the nature, quantitative analysis is corresponding, for further providing theoretical foundation and detect this type of trouble in the scene practice and offer reference at laboratory research.