A single-pore multi-point pore water pressure meter embedding fixing device and an embedding method thereof are disclosed. The device comprises a fixing component, a connecting component and a container, wherein the fixing component consists of a plurality of hanging rods; each hanging rod is provided with a vent hole; two ends of each hanging rod are provided with a screw thread and a sleeve; and one side of each hanging rod is provided with a guidance sliding chute. The connecting component consists of a connecting plate and a supporting plate. The supporting plate is provided with a vent hole. One side of the connecting plate is inserted into the guidance sliding chute; the other side is fixed with an annular hoop. A pore water pressure meter is installed inside the annular hoop. The container for containing water to dip the pore water pressure meter is arranged on the supporting plate. A lead wire hole is arranged on the top of the container for containing water. A pulling wire is arranged on the lead wire of the pore water pressure meter. A signal cable of each pore water pressure meter is led outside a monitoring hole upwardly. The single-pore multi-point pore water pressure meter embedding fixing device solves the problem that the pore water pressure meter in the single-hole multi-point manner is easy to deflect; accordingly, with the application range being enlarged, the single-pore multi-point pore water pressure meter embedding fixing device has the advantages of short device embedding time, low construction cost, low construction difficulty, high monitoring precision, reliable long-term monitoring data, or the like.