According to the requirement of accurate airdrop of small matter under typical sea conditions during maritime rescue， a kind of ribbon airdrop bag based on parachuteless accurate airdrop mode is designed by using the aerodynamics theory. In order to meet the requirements of higher delivery quality， a kind of ribbon with air pocket is designed to improve the delivery quality of parachuteless airdrop package. Through product design， flag-dropping test of tower， image measurement and other means， the falling speed of the airdrop bag is verified， the resistance coefficients of the ribbon are calculated， and the resistance characteristics of the air pocket are analyzed.Therefore， the accurate airdrop of small matter with low cost， light weight and universality is realized.