The invention discloses a width field, achromatism transverse shearing birefringence beam splitter, consisting of six uniaxial crystal flat plates which are spliced along a propagation direction of incident light; two pre-positioned flat plates with identical thicknesses are made of YVO4; optical axes are positioned in an xz plane and a yz plane and form 90-degree angles with the z axis; two flat plates with identical thicknesses in the middle are made of alpha-BBO; optical axes are positioned in the xz axis plane and the yz axis plane and form 45-degree included angles with the xz forward direction and the yz forward direction; detection wave band is in the visible and the near-infrared spectrum band of 0.4 Mum-1Mum; the center wave length is in the 0.7 Mum; the thicknesses of the three groups of flat plates are 2.4mm, 6.7mm and 1.4 mm; the obtained straight strip visual field angle reaches 25 degree; and the dispersion of the optical path difference and the shearing displacement can be effectively inhibited.