The present invention provides a mounting base for a marine wiper, which relates to the field of marine wipers. The mounting base of the marine wiper comprises a first base assembly and a second base assembly arranged at intervals, wherein the structure of the first base assembly is the same as that of the second base assembly, and the first base assembly comprises a first angle steel and a second angle steel; The first angle steel comprises a fixedly connected first horizontal section and a first vertical section, wherein the first vertical section is perpendicular to the first horizontal section, and the first horizontal section is used for fixing on the outer board of the ship; The second angle steel comprises a fixedly connected second horizontal section and a second vertical section, wherein the second vertical section is perpendicular to the second horizontal section, the second horizontal section is provided with a long slot, and the length direction of the long slot extends along the width direction of the second horizontal section; The first vertical section is fitted with the second vertical section, and the first base assembly also comprises a fastener for fixedly connecting between the first vertical section and the second vertical section, so as to fixedly connect the first angle steel and the second angle steel; The end of the first angle steel is provided with a first reinforcing rib, and the second angle steel is provided with a second reinforcing rib, wherein the first reinforcing rib and the second reinforcing rib are connected with a threaded adjusting member, the length direction of the threaded adjusting member extends parallel to the length direction of the first angle steel, so as to adjust the relative positions of the first angle steel and the second angle steel after the fastener is loosened, so as to meet the need for adjusting the position of the wiper during installation.