A method of manufacturing an organic light-emitting diode (OLED) display panel includes: providing a thin film transistor (TFT) substrate comprising a first surface; forming a planarization layer on the first surface; forming an anode layer on a surface of the planarization layer away from the TFT substrate; forming a dam layer on a surface of the anode layer away from the planarization layer; removing the dam layer not shielded by a semi-transparent mask and the anode layer not covered by the dam layer to form a patterned dam layer and a patterned anode layer; and removing a part of the patterned dam layer to expose a part of the patterned anode layer.