The invention discloses a broadband low-profile antenna, which comprises an outer cover, a bottom board, a coaxial cable and an antenna oscillator. The outer cover is fixedly arranged on the bottom board. The broadband low-profile antenna is characterized in that the antenna oscillator comprises a vertical metal sheet and a horizontal metal sheet, which are connected mutually; the vertical metal sheet is connected to the bottom board; and the coaxial cable is arranged between the vertical metal sheet and the bottom board and is used for carrying out feeding on the antenna oscillator. The broadband low-profile antenna is simple and reliable, easy to manufacture and assemble and convenient to produce, and has the advantages of low profile, broadband and direct-current grounding and the like.