The invention relates to the technical field of bulldozers, and relates to a gear shifting control method of a bulldozer electronic control system and the bulldozers. The gear shifting control methodof the bulldozer electronic control system includes the steps that a bulldozer handle is moved to shift gears, pressure in a direction gear clutch decreases from P5 under a current gear to Pa, pressure in a shifting out gear clutch decreases from P5 under the current gear to P2, and pressure in a shifting in gear clutch rises from 0 to P1; at the moment, the shifting out clutch begins to shift outthe current gear, and the shifting in gear clutch and the direction gear clutch begins to shift in a target gear; the pressure in the shifting out gear clutch continues to decrease from P2 to 0, andnow the shifting out gear clutch completely shifts out the target gear; and when the target gear is shifted in, the pressure in a gear clutch begins to rise to a preset valve P5, and gear shifting isfinished. According to the gear shifting control method of the bulldozer electronic control system, universality of a control program is realized, and comfort of gear shifting manipulating is increased.