Pipeline pressure detection device with closed loop feedback function

The utility model discloses a pipeline pressure detection device with a closed loop feedback function, which comprises a first pipeline, one side of the first pipeline is provided with a pipeline inlet, one side of the pipeline inlet is provided with a transmission pump, the pipeline inlet is located at the input end of the transmission pump, and the transmission pump is electrically connected with an external power supply. A first pipeline is arranged on one side of the conveying pump, a second pipeline is arranged on one side of the conveying pump, a controller mounting frame is arranged on one side of the conveying pump and connected with the first pipeline, a PLC is arranged in the controller mounting frame and electrically connected with an external power source, and a second pipeline is arranged on one side of the first pipeline. When the pressure changes, a part of the pressure can be returned to the output end when the pressure at the output end is too large, so that the purpose of automatically adjus