Under the social background of promoting the carbon peak and carbon neutral，for the problem that traditional coastal protection structure cannot meet the response to climate change，biodiversity，green and low-carbon development and other prominent contradictions，we introduce a engineering solution as a new type of bionic-based protection armour unit Coastalock through a comprehensive literature research，and carry out the relevant physical model test and the verification by engineering application.The results show that the armour unit has excellent stability and wave dissipation effect，and is suitable for most of the coastal conditions.The armour unit also has significant effective carbon sequestration and biodiversity，which can assist the port and coastal engineering construction addressing climate change.