The triangular track walking mechanism in tractors relates to the field of agricultural machinery. The triangular track walking mechanism includes driving wheels, walking wheels, guide wheels, trapezoidal brackets, and tracks. The driving wheels and walking wheels are respectively arranged above and below the trapezoidal brackets, and the guide wheels are arranged at both ends below the trapezoidal brackets. The tracks surround the driving wheels, guide wheels, and walking wheels to form a triangular shaped track transmission. The present invention has the characteristics of high ground clearance, good stability, narrow track width, and less pressure on seedlings in paddy fields. Due to the high position of the driving wheels, the vertical load transmitted directly from the ground to the driving wheels is reduced, the impact on the driving wheels is improved, the service life is increased, and the stability is increased