The utility model discloses a portal crane with can dismantle landing leg of living, including landing leg, horizontal case roof beam and vertical track, horizontal case roof beam hangs the hoist through wire rope, the landing leg is in slide in vertical track, the landing leg includes: the left branch leg, it includes a pair of first landing leg of connecting through the head rod, first landing leg top -down includes at least one first thimble assembly and runner assembly, first thimble assembly includes sliding connection's first inner tube and first outer tube, the runner assembly is including supporting a section of thick bamboo and first slider, the right branch leg, it includes a pair of second landing leg of connecting through the second connecting rod, second landing leg top -down includes at least one second thimble assembly and lifting unit, lifting unit includes lift and second slider. The utility model discloses can dismantle the installation fast, be applicable to the hoist and mount operation of various angles and height, make work area grow, the application scope of portal crane wider.