Abstract: With the groundwater pollution being more and more serious, PRB gradually replaces the PumpandTreat and becomes a new development direction of groundwater remediation technologies in China. From the viewpoint of geology, this article uses the Visual MODFLOW to simulate 4 conditions of different hydraulic gradients, dispersities and hydraulic conductivities and analyzes the sensitivity of hanging PRB geometry dimension on hydrogeological conditions. The conclusions are as follows: (1) The greater the hydraulic gradient, the thicker the gate and the lighter the buried deep of PRB; (2) The depth and width of PRB increase with the augment of dispersity; (3) the larger the hydraulic conductivity, the thicker the gate.