The invention discloses an adjustable-position labor-saving go-kart pedal mechanism. A brake pedal and an accelerator pedal are abreast arranged on a pedal mounting plate. A first hinge lug seat and asecond hinge lug seat are arranged on the pedal mounting plate, the brake pedal is connected with the first hinge lug seat through a first hinge shaft, and the accelerator pedal is connected with thesecond hinge lug seat through a second hinge shaft. A turning point of an L-shaped swing rod is connected with the second hinge lug seat through a third hinge shaft. One end of the L-shaped swing rodis connected with one end of a connecting rod through a fourth hinge shaft, and the other end of the connecting rod is connected with the lower middle portion of the accelerator pedal through a fifthhinge shaft. The other end of the L-shaped swing rod is connected with one end of a master cylinder through a sixth hinge shaft, and the other end of the master cylinder is connected with the upper middle portion of the accelerator pedal through a seventh hinge shaft. A go-kart chassis is provided with a T-shaped slide rail, the lower surface of the pedal mounting plate is provided with a T-shaped slide groove, and the pedal mounting plate is in slide fit with the T-shaped slide rail through the T-shaped slide groove. A plurality of positioning holes are distributed in the T-shaped slide rail, and spring pins are arranged on the pedal mounting plate above the T-shaped slide groove and in insertion fit with the positioning holes.