The invention relates to a continuous closed hanging-upside-down shotcreting supporting system. The supporting system comprises an integrated ring beam, a bricked retaining wall, an upper support, a lower support and a box drain, wherein the bricked retaining wall is arranged at the top of the ring beam, the upper support is located at the bottom of the ring beam, the lower support is located below the upper support and surrounds the box drain, and a plurality of circular steel tubes are erected between the upper support and the lower support for supporting. According to the continuous closed hanging-upside-down shotcreting supporting system, the structural arrangement is reasonable, the construction safety is guaranteed effectively, and the stability of soil layer structures is kept, structures of trenches are firm; interval construction is adopted during construction, and the shaft construction is finished twice, so that the construction can be performed in stages, roads around the construction are smooth, and pouring of concrete layers is facilitated.