In this paper the results of the fishing improvement test for the octopus trawlnet operated by Chinese fishing vessels in the West Sahara waters were conducted. The results showed that it is possible to improve net per formance and make it more adaptable to the behaviour of octopus by modifying some dimensions and parameters of the net.The improvement design included expanding main dimension of the net, such as net length, net mouth circumference, lengths of both headrope and groundrope, increasing the weight of the groundrope, and changing the length and distribution of three tickler chains in order to improve the property of the spreading, bottom-touching stability, fish-guiding of the net and disturbance of the tickler chains.The new-designed net has been operated in the Waters from July 17th to December llth, l993. Both the production and output value all incereased more than 17%.The results of this test indicated some important considerations, to which more attention should be paid in further improving trawlnet performance.