The utility model provides a self-elevating offshore platform and a submersible pump tower thereof. The submersible pump tower comprises a tower tube and a plurality of guide devices arranged at intervals along the height direction of the tower tube, wherein chutes are formed in the outer sides of the guide devices so as to be slidably matched with a guide rail on a pile flushing pipe; each guide device comprises a first clamping piece, a second clamping piece, a fixed part and an adjusting piece; each of the two clamping pieces of each guide device comprises a substrate and a barrier plate fixed on the substrate; the substrate of each first clamping piece is fixedly connected with the tower tube; the substrates of the two clamping pieces of each guide device are connected fixedly through a fixed piece, the barrier plates of the two clamping pieces of each guide device are opposite and spaced; each chute is formed between the two corresponding barrier plates; each adjusting piece is arranged between the first clamping piece and the second clamping piece of the corresponding guide device so as to adjust the chute clearance between the two clamping pieces, and the chute clearance of each overwater guide device is greater than that of each guide device underwater. Furthermore, each guide device underwater is flexibly matched with the guide rail through an elastic part. The sliding and clamping stagnation problem of the submersible pump tower is solved.