This is a study to evaluate the safety, feasibility and efficacy of BCMA CAR-T in the treatment of relapsed or refractory multiple myeloma.
The Main research objectives:
To evaluate the safety and efficacy of BCMA CAR-T in patients with relapsed or refractory multiple myeloma
The Secondary research objectives:
To investigate the cytokinetic characteristics of BCMA CAR-T in patients with relapsed or refractory multiple myeloma.

