Abstract: Asymmetry of radiation-drien implosion on Shenguang Ⅱ facility is studied by means of 2D numerical simulations. It is shown from 2D simulation results that asymmetry of the capsule implosion is very sensitive to the non-uniformity of radiation temperature source but the maximum DT average compssion ratio is not sensitive to it. It is also shwn that the asymmetry of implosion has some influence upon the neutron yield as well as the implosion efficiency. The radiation-driven implosion asymmetry can be obviously improved using time-modulation of radiation temperature source.