Abstract:  Crane is one of the important equipment of offshore oil platforms, which, under some special conditions, affects the installation of other platform equipment on the sea. Crane is required to be dismantled on the ground after the installation and commissioning, and reinstalled on the sea after the module installation. Aiming at this problem, we design a new type of frame for the onland dismounting and storage and offshore reinstallation of platform crane. The special structure of the new frame simultaneously solves the problems of large mounting height during the overall dismounting and deviation of center of gravity. This research provides a new feasible way for the disassembly of offshore oil platform cranes.