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螺旋輸送機具有以下特點：
1）結構比較簡單，成本較低。
2）工作可靠，維護管理簡便。
3）尺寸緊湊，斷面尺寸小，占地面積小。在港口的卸車卸船作業中易進出艙口、車廂。
4）能實現密封輸送，有利于輸送易飛揚的、熾熱的及氣味強烈的物料，可減小對環境的污染，改善港口工人的作業條件。
5）裝載卸載方便。水平螺旋輸送機可在其輸送線路上的任一點裝載卸載；對垂直螺旋輸送機配置相對螺旋式取料裝置可具有優良的取料性能。
6）能逆向輸送，也可使一臺輸送機同時向兩個方向輸送物料，即集向中心或遠離中心。
7）單位能耗較大。
8）物料在輸送過程中易于研碎及磨損，螺旋葉片和料槽的磨損也較為嚴重。
螺旋輸送機結構特征：
（1）螺旋輸送機的螺旋葉片有實體螺旋面型、帶式螺旋面型及葉片螺旋面型三種。實體螺旋面稱為s制法，其螺旋節距GX型為葉片直徑的0.8倍，LS型螺旋輸送機適用于輸送粉狀和粒狀物料。帶式螺旋面又稱D制法，其螺旋節距與螺旋葉片直徑相同，適用于輸送粉狀及小塊物料。葉片式螺旋面應用較少，主要用于輸送粘度較大和可壓縮性物料，在輸送過程中，同時完成攪拌、混合等工序，其螺旋節距約為螺旋葉片直徑的1.2倍。
（2）螺旋輸送機的螺旋葉片有左旋與右旋兩種旋向。
螺旋輸送機的應用：
螺旋輸送機廣泛應用于糧食工業、建筑材料工業、化學工業、機械制造業、交通運輸業等國民經濟各部門中。螺旋輸送機主要用于輸送各種粉狀、粒狀、小塊狀物料，所輸送的散粒物料有谷物、豆類、面粉等糧食產品，水泥、粘土、沙子等建筑材料，鹽類、堿類、化肥等化學品，以及煤、焦炭、礦石等大宗散貨。螺旋輸送機不宜輸送易變質的、粘性大的、塊度大的及易結塊的物料。除了輸送散粒物料外，亦可利用螺旋輸送機來運送各種成件物品。螺旋輸送機在輸送物料的同時可完成混合、攪拌、冷卻等作業。在港口，螺旋輸送機主要用于卸車、卸船作業以及倉庫內散粒物料的水平和垂直輸送。利用與物料直接接觸的水平螺旋軸將物料逐層從車廂兩側卸下的螺旋卸車機在國內港口已有多年的成功使用經驗。由水平螺旋輸送機、垂直螺旋輸送機以及相對螺旋取料裝置組成的螺旋卸船機，已成為一種較為先進的連續卸船機型，日益廣泛地應用于國內外散貨專用碼頭。
Application of screw conveyor:
Screw conveyor is widely used in grain industry, building materials industry, chemical industry, machinery manufacturing industry, transportation industry and other sectors of the national economy. The screw conveyor is mainly used for conveying various powder, granular and small pieces of materials. The bulk materials conveyed are grain, beans, flour and other grain products, cement, clay, sand and other building materials, salts, alkalis, fertilizers and other chemicals, as well as coal, coke, ore and other bulk goods. The screw conveyor is not suitable for conveying deteriorating, viscous, lumpy and caking materials. In addition to conveying granular materials, screw conveyors can also be used to transport various finished goods. The screw conveyor can complete mixing, mixing, cooling and other operations while conveying materials. In ports, screw conveyors are mainly used for unloading, unloading and horizontal and vertical transportation of granular materials in warehouses. The screw unloader which unloads the material layer by layer from both sides of the carriage by using the horizontal screw shaft in direct contact with the material has been successfully used in domestic ports for many years. The screw ship unloader, which consists of horizontal screw conveyor, vertical screw conveyor and relative screw feeding device, has become a more advanced type of continuous ship unloader, and is increasingly widely used in special bulk terminals at home and abroad.