The invention discloses an urban road portable tamping device, which comprises a loading vehicle body and a tamping machine frame, wherein the tamping machine frame is fixedly arranged at the right side end of the loading vehicle body; a sliding groove in upwards extending arrangement is formed in the bottom end surface of the tamping machine frame; a tamping machine body is slidingly connected inthe sliding groove in a matched way; a position limiting slide groove is formed in the inner wall of the left side of the sliding groove; an inclined surface position limiting slide block fixedly matched and connected with the left side outer wall body of the tamping machine body is slidingly connected in the position limiting slide groove in a matched way; an ascending and descending driving mechanism fixedly matched and connected with the top end surface of the tamping body is fixedly arranged in the inner top wall of the sliding groove; a downwards extending first cavity is arranged in thetamping machine body; a first rotating shaft in leftwards and rightwards extending arrangement is arranged in the first cavity. The urban road portable tamping device has the advantages that the structure is simple; the operation is convenient; the service life is prolonged; the efficiency is improved; the moving and the transportation are convenient; meanwhile, the tamping work safety is improved.