Abstract: In order to compare the fertilizer efficiency of water soluble fertilizer and traditional sulphur based fertilizer, greenhouse experiments were conducted to study the effects of 20-20-20 water soluble fertilizer of Stanley, urea and 15-15-15 sulfur fertilizer on celery. The results showed that the celery plant height was the highest under the 20-20-20 water soluble fertilizer of Stanley treatment during the whole growth period, and when harvested, the plant height was 12.9% and 4.0% higher than those under urea and 15-15-15 sulfur fertilizer treatments, respectively. The fresh weight, theoretical yield of celery treated by 20- 20- 20 water soluble fertilizer of Stanley were significantly higher than those of other treatments, the theoretical yield was 81.7% higher than that under urea treatment, and 15.7% higher than that under 15-15-15 sulfur fertilizer treatment. The economic income of celery treated by 20-20-20 water soluble fertilizer of Stanley was also the highest, increased 36765 yuan/hm2 than urea treatment (increase rate was 98.7%) and increased 9840 yuan/hm2 than 15-15-15 sulfur fertilizer treatment (increase rate was 15.3%). The results indicate that although the application of water soluble fertilizer costs greatly, its efficiency is also the highest.