The invention provides a device for detecting the throughput of a pipe in the field of automobile pipes. A device frame (1) of the device is provided with a compressed air supply part (2), and is alsoprovided with an installation support (3). The lower part of a pipe positioning sleeve (4) on the installation support (3) is communicated with a detection pipe sleeve (5). The bottom of the steel ball detection pipe sleeve (5) is also provided with a gravity sensor (6). A pipe locking part (7) is disposed above the pipe positioning sleeve (4), and the bottom of the detection pipe sleeve (5) is connected with the compressed air supply part (2) through a gas pipe. The compressed air supply part (2) and the gravity sensor (6) are connected with a control part (8). The device provided by the invention is simple in structure, is convenient and quick in detection, can achieve the batch detection of the throughput of the pipes, and effectively improves the detection efficiency of the pipe on the basis that the detection result is guaranteed to be accurate and detection results are guaranteed to be high in consistency.