Horizontal well sand removal pipe column device and sand removal method

The invention discloses a horizontal well sand removal pipe column device and a sand removal method. The horizontal well sand removal pipe column device comprises a sand-liquid mixing assembly, a screw pump assembly, a sand filtering assembly and a driving motor, wherein the sand-liquid mixing assembly extends into a horizontal production section; the sand-liquid mixing assembly, the screw pump assembly, the sand filtering assembly and the driving motor are sequentially connected; a paddle stirring shaft and paddle stirring blades are arranged in the sand-liquid mixing assembly; a screw pump rotor is arranged in the screw pump assembly; a connecting long shaft is arranged in the sand filtering assembly; one end of the paddle stirring shaft is connected with one end of the screw pump rotor; the other end of the screw pump rotor is connected with one end of the connecting long shaft through a first universal coupling; the other end of the connecting long shaft is connected with a motor shaft of the driving moto