The utility model discloses a sand pump pipe string which overcomes the defect of frequent demounting of sand pumps of existing sand pump pipe strings. The sand pump pipe string comprises a sliding sleeve (2), an upper uniflow valve (3), a sand pump (4), a sand containing barrel (5) and a lower uniflow valve (6) in sequential connection. The sliding sleeve (2) comprises an opening and communicated with the outside through the opening. The upper uniflow valve (3) is off when pressure in the sand pump (4) and the sand containing barrel (5) is smaller than the external pressure and is on when the pressure in the sand pump (4) and the sand containing barrel (5) is larger than the external pressure. The sand containing barrel (5) serving as a counterweight comprises multiple oil pipes in connection. The sand pump pipe string is effective in sealing, long in service life and more reliable in use.