The invention relates to a screed tamper, which is provided with a chassis in a flat dustpan shape. Three sides of the chassis are raised, the back side of the chassis is cut open, two trapezoidal upright plates are vertically welded on the surface of the chassis, the upper part of the upright plate is symmetrically provided with four shaft housings which can be correspondingly connected and used with operating arms of an excavator, a reinforced support shaft is welded between the two upright plates, and the outsides of the two upright plates are welded with reinforced oblique support plates. The screed tamper has low cost and simple operation; screed and tamped slope can be formed in one step; and the screed tamper is smooth, can be matched and used with the excavators of any model, and saves manpower greatly.