The utility model provides a heat dissipation lamp shell which comprises a heat radiation main body, a luminous unit and a lamp cap. The luminous unit comprises a plurality of surface mounted device (SMD) high-power light sources, a base plate and high thermal conductivity heat dissipation silica gel. The difference between the distance among heat dissipation holes in the upper half portion of the heat dissipation main body and the distance among heat dissipation holes in the lower half portion of the heat dissipation main body is 1-2mm. The base plate comprises an upper portion and a lower portion. The difference between the angular value of each two SMD high-power light sources on the upper portion of the base plate and the angular value of each two SMD high-power light sources on the lower portion of the base plate is 6-8 degrees. Heat dissipation amount deviation between the upper side of the heat dissipation main body and the lower side of the heat dissipation main body is achieved by means of angle asymmetric arrangement, air convection of the whole heat dissipation main body is formed due to the fact that the deviated heat dissipation holes and inner cavities are communicated, and therefore good heat dissipation effects are achieved.