Overload failure spanner handle

The invention discloses an overload failure spanner handle. The overload failure spanner handle is used for connecting with a spanner clamping head, and has a handle with an overload failure function. An actuation element of the handle failure is an electromagnet; as the handle is smaller, the provided power supply voltage is limited; and when a spanner tightens a bolt, the stressed load is higher, so that the handle adopts a steel ball to position to realize an action of low voltage driving a high-load part by using the characteristic of low friction factor of the steel ball. The overload failure spanner handle has the following advantages: the action of low voltage driving the high-load part is realized by using the characteristic of low friction factor of the steel ball; when the pretightening force applied to tighten the bolt by the spanner reaches a needed value, a control system sends an electric signal to the electromagnet; the electromagnet powerfully sucks a fixed sleeve to unlock the steel ball; and