Horn capable of improving high-frequency effect

The utility model relates to the technical field of loudspeakers, in particular to a loudspeaker capable of improving high-frequency effect, which comprises a support, a diaphragm, a voice coil and a magnetic circuit system. The voice coil is connected with the diaphragm; the magnetic circuit system is arranged at the bottom of the diaphragm; the loudspeaker capable of improving the high-frequency effect further comprises a protective cover arranged on the support. The protective cover is arranged at the top of the diaphragm; a first fixing part connected with the bracket is arranged on the periphery of the diaphragm; a second fixing part connected with the bracket is arranged on the periphery of the protecting cover; a central part is arranged in the middle of the protecting cover; a circular ring part and a ventilation groove are arranged between the center part and the second fixing part at intervals. According to the utility model, the top of the diaphragm is provided with the protective cover, and the pr