Crane with alarm device

The utility model discloses a crane with an alarm device, which relates to the technical field of cranes and comprises a main cross beam, supporting legs and the alarm device. One end of the main beam is connected with a crane body; the other end of the main beam is connected with legs; the lower sides of the supporting legs are connected with supporting leg bases through spherical hinges; an annular plate is arranged on the supporting legs; the warning device comprises a hinge seat, a supporting sliding rail, a sliding block, a straight rod, a supporting block, a button and a warning lamp, after the positions and heights of the supporting legs are adjusted through the main cross beam, the supporting legs are fixed through a base plate and the like, the power supply box is opened, the warning lamp is powered on, if a supporting leg base inclines, the straight rod moves upwards to touch the button, and the warning lamp is turned on. The controllable range of the inclination angle of the supporting leg base can