Steel tube lifting hook

The utility model relates to a steel tube lifting hook which comprises a hook body (1) and a locking clamping block (2). A bolt hole (5) is formed in the end portion of one side of the hook body (1). A bolt hole (5) is also formed in the locking clamping block (2). A bolt (3) penetrates through the bolt hole (5) in the hook body (1) and the bolt hole (5) in the locking clamping block (2) to enable the hook body (1) and the locking clamping block (2) to be connected together. At least one part of the locking clamping block (2) is located inside the hook body (1). The locking clamping block (2) swings around the bolt hole (5). The steel tube lifting hook has the advantages that a steel tube can be automatically locked through the locking clamping block in the lifting process, the steel tube is safely transported and can not be disengaged, and the steel tube lifting hook is the same as a common lifting hook in the appearance. When upward pulling force is exerted on the steel tube lifting hook, the internally-arr