The invention discloses a piezoelectric on-off valve type jetting dispensing head, and relates to a dispensing device mainly for the quick assembly of electronic chips. The jetting dispensing head is provided with a base, two piezoelectric ceramics, pull rods, a triangular block, a heating block, stop blocks, a nozzle, a firing pin, a flexure hinge and a liquid supply device, wherein the base is provided with the flexure hinge, two piezoelectric ceramics are pre-tensioned on two arms of the flexure hinge respectively through stop blocks, the stop blocks are arranged in the front end of the piezoelectric ceramics respectively, and are fixed on the base by the pull rods and embedded in stop blocks guide groove of the inner frame edge of the base; the nozzle is fixed on the front end under the base; cover plates are arranged on two sides of the base respectively, the rear ends of two cover plates are fixed on two arms of the flexure hinge by bolts, and the triangular block are fixed on the front end of two cover plates; the firing pin is arranged on the front end of the triangular block; the heating block is fixed on the lower part of the base; the liquid supply device is provided with a colloidal runner, an inlet conversion adapter and an inlet hose; and the liquid supply device is arranged on the lower part of the base, a heat-insulating groove is arranged between the base and the liquid supply device, and the colloidal runner is externally connected with the liquid supply device through the inlet conversion adapter and the inlet hose.