Single-core plugging and heterogeneous parallel-dual-core flooding tests were carried out to investigate the plugging performance and profile control ability of viscoelastic branched-preformed particle gel（B-PPG）. The results show that B-PPG migrates in the core in a manner of plugging-alternating-pass by deforming and restoring its particles shape alternately. The high permeability channels in the core can be blocked effectively by B-PPG and a high resistance factor and plugging efficiency（higher than 97%）can be achieved. Both the resistance factor and plugging efficiency increase with the increase of the core permeability，B-PPG concentration，and brine salinity；however，both factors decrease with the increase of injection rate and temperature. The water injection profile in the heterogeneous parallel cores can be significantly improved because B-PPG can selectively block high permeability core and divert the displacement to the low permeability core. B-PPG exhibits a good performance in profile control when the high to low permeability ratio of the two parallel cores is smaller than 7.1 and the injected B-PPG slug is between 0.25 to 1.0 PV.