Open-close type gabion underwater construction method

The invention discloses an opening and closing type gabion underwater construction method, relates to the technical field of gabion underwater installation auxiliary devices, and aims to solve the problems that an existing gabion is low in underwater construction speed, high in cost and high in difficulty. The method comprises the steps that firstly, a gabion is placed in a gabion containing cavity in a device body in a dry environment, at the moment, a bottom turning plate at the bottom of the device body is located in a closed device, and then the gabion is filled with a proper amount of stone; secondly, after filling is completed, the second sling is lifted preferentially through the crane, and then the device body is lifted through the first sling and moves towards the designated position; and thirdly, after the device reaches the designated position, a first sling is arranged below the device, the device containing the gabions and the stones is hoisted to the underwater position, a second sling is gradua