How to improve the fishermen's social security level is a social common concern. This article analyzed the fishermen comprehensive social security index. Through the interviews and questionnaire investigation about fishermen comprehensive social security performance at Zhangzhou village in Zhejiang Province and Kunpeng village in Guangdong Province, using the fuzzy evaluation method, this article measured the comprehensive performance of the fishermen's social security. We found that:under the same conditions, the fishermen's social security level is higher who attend the fishery cooperatives than those who do not attend the fishery cooperatives; the higher the level of the organization, the fishermen's social security level is higher. Through relevant policies,government should guide fishermen to join the organized groups such as fishermen' scooperatives, this is an effective ways to improve the fishermen's social security performance.