A radiator under cover for construction equipment is provided to reduce manufacturing cost and streamline manufacturing processes by improving a complicated part structure. A radiator under cover for construction equipment comprises: a body plate(12) installed at the lower part of a radiator; and a plurality of guide wings being unitarily formed with the body plate and having the gradient from the one side of the body plate to be connected to a vent. The guide wings are apart from each other with a vertical support part and a horizontal support part which are unitarily formed with the body plate. The reinforcing member is installed on the top of the horizontal support part. The reinforcing member is welded along the longitudinal direction of the body plate. The body plate comprises a plurality of coupling holes(7) and side supports(16) to insert a fixing member.
