The invention provides a C-shaped direct-flow burner for a pulverized coal-fired boiler. The burner is arranged on the pulverized coal-fired boiler, and comprises a first direct-flow pipeline, a cambered pipeline, a second direct-flow pipeline and a nozzle, which are sequentially connected, wherein the outer wall of the nozzle is inwards sunken; the section of the end part of the nozzle forms a shape at least with a C-shaped; pulverized coal forms jet flow with a C-shaped cross section after being sprayed into a hearth, and is ignited on the tip of the C-shaped jet flow and the two sides adjacent to the tip to ignite a main jet flow part in little-flame ignition and double-sided ignition manners respectively. The burner has the comprehensive advantages of high ignition stability, high burnout degree and less NOx emission, the problem of difficulty in the ignition of anthracite, meager coal, brown coal and poor bituminous coal can be solved, and the burning performance of the pulverized coal-fired boiler can be remarkably improved.