Abstract: A long-term fertilization experiment coupled with split plot experiment was carried out to explore the effect of different modes of long-term fertilization on rice yield and basic soil productivity in coastal paddy. The results showed that long-term non-fertilization application decreased rice yield significantly, with the experiment going, rice yield in non-fertilization application (CK) decreased year by year and the decreasing range was 34.4% during the test period. Long- term chemical fertilization application (NPK), long- term chemical soil testing fertilization application (N1PK) and long- term chemical soil testing fertilization application combined with organic fertilizer (N1PKS) increased rice yield. Compared with CK, the rice yield under NPK, N1PK and N1PKS increased by 74.2% , 89.0% and 97.5% , the differences were all highly significant. NPK, N1PK and N1PKS improved basic soil productivity (BSP), especially N1PKS. During the test period, NPK, N1PK and N1PKS increased BSP yield by 45.6%, 60.8% and 69.1%, as compared with CK. There was no significant difference in the contribution rates of basic soil productivity between NPK, N1PK and N1PKS.