Abstract:In order to manifest Zhongyan103's varietal characteristic of slight sweet scent in Panzhihua ecological conditions, "3414" project is used to study the suitable dosage of NPK fertilizer, and the test results also has been validated. Compared the tobacco's main agronomic characters, economic properties and chemistry quality affected by NPK fertilizer, it is confirmed that the suitable dosage of NPK fertilizer were N=87.37 kg/hm2 , P=103.57 kg/hm2 , K= 353.72 kg/hm2 , in this dosage of NPK fertilizer, therefore it is obtained that the maximum economic yield was 3 528.4 kg/hm2