The invention discloses a BP material-based micro disc resonator. The BP material-based micro disc resonator comprises an absorption layer, a photoelectric nanometer cavity, a bus waveguide, a source-drain-gate electrode and an SOI platform layer, wherein the absorption layer, the photoelectric nanometer cavity, the bus waveguide and the source-drain-gate electrode are sequentially arranged on theSOI platform layer, the BP material-based micro disc resonator is characterized in that the absorption layer employs two-dimensional material black phosphorus, the photoelectric nanometer cavity employs a Si material, the bus waveguide employs a Si material, and the source-drain-gate electrode employs a metal Au material. Traditional WGM formed in a micro disc is combined with improvement of mutual effect of a BP light substance, and the resonance wavelength can be within a near-infrared range; and by employing a coupling die theory, the mutual effect of a BP cavity system and a Si micro discresonant cavity can be analyzed, and the development of a new near-infrared ray (NIR) BP photoelectric device combined with an optical micro resonator is favorably pushed.