To explore the maximum tolerated dose (MTD) of pomalidomide in combination with obinutuzumab in patients with relapsed/refractory indolent lymphomas (including follicular lymphoma, marginal zone lymphoma, and chronic lymphocytic leukemia/small lymphocytic lymphoma) treated with the pomalidomide plus obinutuzumab combination regimen, and to determine the recommended phase II dose (RP2D); concurrently evaluating the efficacy and safety of pomalidomide combined with obinutuzumab in patients with relapsed/refractory indolent lymphomas.