Channel fracturing is the key technology to develop low and ultra-low permeability reservoirs with high efficiency and low cost. The key of channel fracturing is to create the unimpeded channel network in the fractures for oil and gas flow. However，researches on the proppant shape and channel characteristics in channel fracturing are in the initial stage. A large-scale visual slot equipment was used to simulate the proppant transport process in the channel fracturing. The effects of fiber，fracturing fluid，proppant，pumping velocity and pulse time on proppant transport and flow channel were studied.The experimental results show that the fiber and fracturing fluid determine whether the flow channel can be formed within the propped fracture，and the pump velocity and pulse time have a great influence on the flow channel morphology. The proppant density and size have less influence on the flow channel morphology. The molecular chain of guar gum is wound on the fiber surface，which makes the range of fiber network increase and the strength enhance. The fiber network and molecular chain together improve the stability of the slurry pulse in the transportation process. The flow channels can be divided into three categories and the flow channel morphology is controlled by product of pump velocity and pulse time. When the injection parameter of pulse unit is 2.5-5 L，the flow channel morphology obtained is optimal and the conductivity of propped fracture is the largest.