Trailer crane

The utility model provides a towing crane, which comprises a rotating platform, a luffer, a telescopic mechanism, a cargo boom, and a cargo boom framework. Rolling wheels are provided on the horizontal supporting axle that is fixed on the cargo boom framework, a sliding sleeve is hinged on the rotating platform, the cargo boom goes through the sliding sleeve and sliding connected with the rolling wheel on the cargo boom framework. Locating holes are provided on the two sidewalls of the sliding sleeve and the two sidewalls of the bottom of the cargo boom, and when the locating holes are in a line, the cargo boom is capable of connected with the sliding sleeve via a detachable locating pin, thereby greatly shortened the length when towing the crane, and centralized the centers of gravity of all the parts of the towing crane, enhanced the stability and provided with a higher safety rates when transporting, and reduced the cost when parking in garage. The utility model is logic and compact in structure, low in cost, practical and suitable for promote.