The utility model discloses a detachable sonar dome for intermediate-and-high-speed boats. Aiming at the sharp and thin fore body linetype characteristic of the intermediate-and-high-speed boats, the sonar dome can be installed and detached externally to achieve maintenance of a sonar array. The sonar dome is of a horizontal framework structure, namely a structure that the sonar dome is divided into three or more annular parts in the length direction of the main body of a naval boat, wherein each annular part comprises a metal framework and a dome housing arranged outside the metal framework, the annular part where the sonar array is located is detachable, and other annular parts are fixed. The sonar dome is simple in structure, capable of facilitating construction, low in manufacturing cost, and high in detaching and maintaining manufacturability.