Preparation method of composite lifting lug and composite lifting lug

The invention aims to provide a preparation method of a composite lifting lug and the composite lifting lug. A novel lifting lug preparation process is adopted to solve the technical problem that a lug hole is not easily formed during preparation of an existing composite lifting lug, and the strength of the lug hole structure is too low. The method comprises the following steps that a lug hole column is prepared, wherein the length of the lug hole column is greater than the depth of the lug hole by 10-30 mm; coating a release agent is conducted, and specifically, coating the release agent is conducted in a mold cavity for 1-2 times; the setting position of the lug hole is marked, the lug hole column is assembled, and coating the release agent for 1-2 times on the exposed surface after thelug hole column is bonded; a first glass fiber cloth layer is laid, and a hollowed hole matched with the cross section appearance of the lug hole column is formed on an interference part on the glassfiber cloth layer; and an