Specific sewage pipeline diagnosis method based on portable equipment

The invention relates to the technical field of sewage pipe network detection, and discloses a specific sewage pipeline diagnosis method based on portable equipment. The method comprises the following steps: (1) inputting the topological structure and the pipeline information into a portable device to form a digital model of a to-be-checked pipeline; (2) opening the well one by one from the upstream to the downstream of the plurality of sewage pipelines at the same time to take water samples in the peak period of water use in sunny days, confirming that no water is discharged from the connecting branch pipes in the well, filtering the taken water samples by using a needle type filter membrane with the average pore diameter of 0.45 mu m, and then carrying out index detection by using the portable equipment; and (3) executing a computer program to carry out data analysis on the water sample. The method provided by the invention does not need to detect pipeline flow data, does not need to monitor water quality d