The utility model provides a portal frame and hoisting device belongs to construction hoisting equipment field. Wherein, the portal frame includes crossbeam, a first supporting beam and second supporting beam, and the crossbeam includes the first roof beam body, the second roof beam body and extensible member. The extensible member includes first extrusome and second extrusome, first extrusome relatively the second extrusome slide and the one end that first extrusome was kept away from to the second extrusome is kept away from or be close to to the one end that makes first extrusome keep away from the second extrusome, first extrusome and second extrusome are equipped with reset spring. The one end of second extrusome is kept away from to first extrusome and the one end of the first roof beam body articulates the other end and first supporting beam fixed connection of the first roof beam body. The one end of first extrusome is kept away from to the second extrusome and the one end of the second roof beam body articulates, and the other end and the second of the second roof beam body prop up supporting beam fixed connection. When the crossbeam atress, the angle between first supporting beam and the second supporting beam will change, strengthen the stability of portal frame.