Windows-breaking emergency escape device

A window-breaking emergency escape device comprising:

• a main body, a hammer and a supplementary power apparatus, the hammer and the supplementary power apparatus are installed on the main body, a front end of the hammer protrudes from a surface of the main body, the supplementary power apparatus further comprises a handler, an elastic component, a buckling component and a release button, wherein a groove is disposed on the main body for receiving the hammer, the elastic component is disposed between the hammer and the groove for providing a force to push the hammer outward, a circle rim is disposed on the hammer, and the handler is pivoted on the main body, one end of the handler extends to form an extruding portion that contacts against the rim on the hammer, when a user moves the handler, the hammer will be pushed inward to press the elastic component, the buckling component is pivoted and fixed firmly on the main body, one end of the buckling component contacts against the release button, another end of the buckling component extrudes and extends into the groove that contains the hammer, when the hammer is pushed by the extruding portion of the handler to move backward and to push the elastic components to a certain position, the hammer will be held by the buckling component.