Abstract: For research the actual-effect of fish culture in paddy fields on utilization ratio of agricultural resource in large-scale area in a usual year, the method is to collect and analyze first-hand data of input and output ,Which come from 262 farmers and their family and 50.59 hektare on the yield of rice paddy in 8 villages of 5 counties (QuanZhou, XingAn, RongShui, SanJiang, PingNan) with more paddy-fields-fish-culture and 1 village of 1 counties (HengXian) without paddy-fields-fish-culture. This villages are located in the northern region, northwest region, southeast region of Guangxi. Here are the results: (1)The rice yield: The rice yields per time of 8 villages with paddy-field-fish-culture had a higher output than the average of their county. Three of them had an extremely higher output, and the others five villages were not so much notable output.(2)The chemical fertilizer usage: 6 inquired villages with paddy-field-fish-culture had a chemical fertilizer usage plan, Their chemical fertilizer usage is notable lower than the other villages without paddy-field-fish-culture in the same counties. (3)The pesticide usage: six of villages with paddy-field-fish-culture had the pesticide usage plan. ①The pesticide input of 6 inquired village with paddy-field-fish-culture was 404.93(yuan/hm2) lower than the input of a village without paddy-field-fish-culture at least, the lowest was 1098.98(yuan/hm2). ②The pesticide input of 6 inquired village with paddy-field-fish-culture for a ton of rice yield was 25.30(yuan/hm2) lower than the input of a village without paddy-field-fish-culture at least, the lowest was 91.84(yuan/hm2). ⑷The net income: The net income of villages with paddy-field-fish-culture was averagely 5362.73 (yuan/hm2) higher than the net income of villages without paddy-field-fish-culture in the southeast region of Guangxi. Micro-study show that the paddy-field-fish-culture can remarkably promote the utilization-ratio of agriculture resource in Guangxi province.