Using the seedlings as test material,experiments were carried out to study the effects of different matrix proportion on the nutrition growth of Prunus davidiana.The results showed that the values of plant height,stem diameter,biomass of Prunus davidiana seedlings which were planted in the mixed matrix of vermiculite and perlite (1:1) were the highest,and the values of those which were planted in the mixed matrix of clay soil and sand were the lowest.The results offer some references for soil-free cultivation of peach.