The utility model discloses an integrated optics strong electric field sensor relates to electric field monitoring technology field, has solved current integrated optics strong electric field sensor,and optic fibre can not be aimed at with the fiber waveguide on the waveguide substrate completely, leads to integrated optics strong electric field sensor's insertion loss increase, influence the technical problem of integrated optics strong electric field sensor's stability. This integrated optics strong electric field sensor includes: the waveguide substrate is provided with the fiber waveguideon the waveguide substrate, the extending direction vertically both ends of waveguide substrate and fiber waveguide all are provided with a silico briquette, are provided with V type groove on everysilico briquette, the V type inslot bare fibre that has all bonded, and the bare fibre of the V type inslot of a silico briquette is aimed at with the one end of fiber waveguide, and the bare fibre ofthe V type inslot of another silico briquette is aimed at with the other end of fiber waveguide. The utility model discloses be applied to the electric field monitoring.