This experiment was carried out to investigate the effect of slow-release fertilizers on yield of chinese cabbage and spinach. Fertilizers were treated with CDU, MEISTER, Jobi Gohyungbokhapbiryo, Kyungki Wonyebokbi 1ho, kyungkibokbi Nojeok, Kyungki Jeonjakgohyungbokbi, Traditional manuring, and No manuring. Yields of chinese cabbage were increased with slow-release fertilizers, and CDU was more effective to the head than to the out-leaf, especially. Spinach was increased with slow-release fertilizers, also. However, analysis of chemical components of plants and soil were no difference. It was very effective to increase yields of chinese cabbage and spinach, to reduce in number of supplementary manuring and laboring