Abstract: Studied the effection of different row direction on population light distribution in different panicle types, it showed that, the population could receive more light in SN direction than that in WE direction of both erect panicle and curve panicle type rice. No matter S-N or WE direction, solar intensity at different height of erect panicle was bigger than that of curve panicle type rice. The reflection intensity above rice canopies of erect panicle was weaker than that of curve panicle type rice. Both erect panicle and curve panicle type rice were suit planted in S-N direction.