By the methods of FTP and DEA, the marine fishing capacity in China was studied in quantity. The results showed that: it is better that the input index in the FTP methodology was considered as total power but not as amount of ships in measuring the Chinese marine fishing capacity. The further analyses made it clearer that the great excess of marine fishing capacity in China is the total power of fishing ships. Then, this paper suggested that the 35.2 % amount of ships, 29.8 % gross tonnage and 37.3 % total power should be curtailed in China, so as to the present marine catch equal to that in 1999. In discussion the approach of supplement peak year was proposed. This paper found that the FTP methodology is suitable to market economy and is better as a longitudinal analysis in time arrays, but the DBA approach is applicable to the transverse comparison of fishing capacity in a same time period. The analyses showed also; the capacity, which has been based on the practical catch, is commonly lowly estimated. So the fishing capacity reduced in practice is generally larger than the calculated values.