The invention belongs to the technical field of bicycles and particularly relates to a bicycle pedal with a warning function. The bicycle pedal comprises a bicycle crank, a pedal body, a rotation module, a flashing lamp module and a power generation module. Two annular grooves are formed in the end portion of the bicycle crank along the circumferential surface, and a groove ring is arranged on themiddle portion of the bicycle crank; the pedal body is installed on the bicycle crank through the rotation module; the rotation module is used for making the pedal body rotate on the bicycle crank, and the pedal body is prevented from being worn; the flashing lamp module is used for achieving alternate flashing of lamplight on the pedal body; and the power generation module is used for convertingpart of kinetic energy generated in the rotation process of the pedal body into electric energy. When badly worn, the bicycle pedal can be continuously used only through replacement of one componentin the rotation module; and meanwhile, part of kinetic energy generated in the rotation process of the pedal body can be converted into electric energy to provide electric energy for a bicycle lamp, LED lamps alternately extend outside the pedal body so that the LED lamps can flash, and the warning effect is achieved.