The utility model discloses a shield tail brush sealing performance testing arrangement, it includes frame, pressure test groove, upper cover, pressure monitoring device, that installs a plurality ofexaminations of awaiting measuring on the inslot bottom surface in pressure test groove is surveyed tail brush, every inside of being surveyed tail brush is equallyd divide and do not is linked together with oil feeding system through the grease pipeline that seals in the confession oil through holes that the dress seted up on pressure test tank bottom board, be linked together with thick liquid filling pipe system through the mud pipe way of sealing in the confession thick liquid through -hole that the dress seted up on pressure test tank bottom board in being surveyed the cavity of tail brush incline direction low order end, pressure monitoring device's pressure signal input end is connected at the PRESSURE DETECTOR of high pressure chest and low pressure intracavity with setting up respectively through the cable respectively, adopt the device can realize shield tail brush lectotype and tail brush layout design under the different pressure conditions, avoid the tunnel construction risk that causes the leakage to bring because of the tail brush lectotype is improper.