The utility model discloses a detection bracket of a detection device of a tire pressure monitoring system. The device comprises a wheel connecting disc arranged in the middle of the axial surface ofa to-be-detected wheel, a supporting rod arranged in the radial direction of the to-be-detected wheel, an electrical integrated slip ring and a guide support parallel to the axial direction of the to-be-detected wheel. The axis of the electrical integrated slip ring coincides with the axis of the wheel connecting disc. A rotor of the electrical integrated slip ring is connected to the middle of the wheel connecting disc, a ring sleeve sleeving a stator of the electrical integrated slip ring is hinged to the lower end of a supporting rod, the upper end of the supporting rod is inserted into a fisheye universal ball at one end of a guide support, and a strong magnetic sucker connected with a vehicle body is arranged at the other end of the guide support. According to the utility model, the performance and reliability of the tire pressure monitoring system can be detected in a real operation environment through ingenious arrangement of the wheel connecting disc, the electrical integratedslip ring and the support rod.