The invention discloses a corn-shaped LED lamp with safely-exposed surface-mounted lamp beads. The corn-shaped LED lamp comprises a cylindrical light source (6), and a semispherical light source (7) which is connected with the lower end of the cylindrical light source, wherein the cross section of the cylindrical light source is regular polygon, and the cylindrical light source comprises a plurality of elongated aluminum substrates, and the surface-mounted lamp beads (3) which are arranged at intervals on the aluminum substrates; the semispherical light source is formed in a manner that the surface-mounted lamp beads are arranged at intervals on arc-shaped aluminum substrates, and one end of each aluminum substrate close to an axis is in contact with each other, wherein the arc-shaped aluminum substrates are formed by bending elongated aluminum substrates which extend at intervals of one or some from one end of the cylindrical light source; the outer surfaces of the surface-mounted lamp beads and the circuit surfaces of the aluminum substrates are covered with transparent glutinous substances and transparent insulated particles, wherein the transparent insulated particles are integrally adhered to the glutinous substances. According to the corn-shaped LED lamp, the problem due to the insulation of electrodes of the lamp beads and the crossing of bonding pad can be solved; the transparent particles can split the light on the lighting surfaces of the lamp beads; the surface-mounted lamp beads can be safely exposed and are high in output power, high in heat dissipating performance and long in service lives.