The effects of applying desulphurization byproducts on radish growth in pot-experiment with acid soil were studied. It was showed that (1) applying desulphurization products to red soil derived from different parent material was effective in promoting the growth and improving the quality of radish; (2) The reason for positive effects could be that the desulphurization products are rich in Ca, S, B, Si, Mo e.t.c.Which are just lack generally in red soils. By applying desulphurization products properly, the physical and chemical property of soils was also effectively improved; (3) The content of heavy metal such as Pb, Cd, Cr, As, Se, Ni, Cu e.t.c. in desulphurization products was below the national set limit, thus applying desulphurization products properly to the soil, the content of heavy metal in the first season crop was below the set limit for nuisanceless food.