Underwater pressure pipeline and construction method thereof

The invention relates to an underwater pressure pipeline and a construction method thereof, the pipeline comprises a pipeline body and at least one suspended matter sensor, at least the lowest position of the pipeline body is provided with four-way pieces, and each four-way piece corresponds to at least one suspended matter sensor; the lower port of the four-way piece is blocked to form a sedimentation tank, and a probe of the suspended matter sensor is arranged in the sedimentation tank; the upper port of the four-way piece extends upwards to form an inspection well, and a blind plate is detachably plugged at the mouth of the inspection well; an exhaust pipe communicated with the inspection well is arranged on the blind plate, an upper end pipe opening of the exhaust pipe is always located above the water surface, and a host of the suspended matter sensor is arranged at the position of the upper end pipe opening of the exhaust pipe. The pipeline construction method comprises the steps of route design, pipeli