The invention relates to a basin type insulator for high-current electric power transmission equipment. The basin type insulator at least comprises a tube type flange, a connecting conductor and an insulation casting body, and is characterized in that the insulation casting body is in an annular shape, the connecting conductor is arranged in a hole of the annular insulation casting body and is in bilateral symmetry by using the annular insulation casting body as the center, the tube type flange is arranged outside the annular insulation casting body, the upper and lower surfaces, near the excircle part, of the annular insulation casting body are respectively and correspondingly provided with first annular grooves, a first O-shaped sealing ring is arranged in each first groove, the upper and lower surfaces, near the inner circle part, of the tube type flange are respectively and correspondingly provided with second annular grooves, a second O-shaped sealing ring is arranged in each second groove, two ends of the connecting conductor are respectively provided with a plurality of annular conducting grooves, and a spring contact is sheathed on each annular conducting groove. The basin type insulator has the advantages that the problem of usage occasion limitation of the traditional basin type insulator is solved, and in addition, the sealing performance is good.