The study of hydraulic fracture patterns has important practical significance in oil and gas production. This research focuses on the study of hydraulic fracturing problems with peridynamics. A fully coupled fluid-filled explicit peridynamics model in saturated porous media is presented in this paper to study the two crack behaviours, including cracking branching in porous media under different loading conditions and the stepwise phenomenon. By comparing the numerical results, it is proved that this explicit peridynamics model is able to help understand the effect of the pore pressure in hydraulic fracturing branching and provide more evidence for stepwise phenomenon with peridynamics.