In installation of prefabricated members of high-pile wharf,the floating crane is used traditionally. In some projects with bad weather and complex sea condition,by installation by floating crane faces many problems,such as slow installation,great investment of supporting ships and machines,low utilization rate,great cost and safety risks. This article introduces a dock prefabricated hoisting technique,which changes the water construction to the land construction,and which has the advantages of quick installation,less risks,high accuracy and low cost,and thus is especially advantageous in unsheltered sea area.