The utility model provides a fixing device of a vehicle-borne mobile phone, belonging to the technical field of machinery. The technical problem that the fixation of existing vehicle-borne mobile equipment is unstable and driver vision is interfered is solved. The fixing device comprises a fixed seat, a connection rod and a fixed clip. The mobile equipment can be clamped by the fixed seat. The upper end of the connection rod is connected to the fixed seat, and an angle adjusting mechanism which allows the fixed seat to swing relative to the connection rod is arranged between the connection rod and the fixed seat. The lower end of the connection rod is connected to the fixed clip which comprises a clip body which is provided with a clip mouth capable of clamping a vehicle A rod. The clip body is also provided with a thread hole which communicates with the clip mouth. The thread hole is threadingly connected to a fastening bolt. A rubber pad capable of being close to the vehicle A rod is fixed at one end of the fastening bolt. According to the fixing device, the fixation stability of the vehicle-borne mobile phone can be improved, and the vision of a driver is not affected.