This series product is a new generation small size tractor which is designed for meeting the demands of both international and domestic markets, and adopts international and domestic advanced tractor structure. This series tractor is designed with international standard rear PTO and has the characteristics of large traction, more shifts, reasonable speed, compact structure, and convenient operation and maintenance, which can meet all field operations, fixed operations and transportation in different area and different conditions. Its matched engine is single cylinder, horizontal, four-stroke and direct injection, which power ranges from 18hp to 24hp with different types such as circling, condensing and double cooling system of water circling and vaporizing. The transmission box is (4 + 1) x 2 composing mechanical type, and the tractor's speed ranges from 2.8km/h to 28.81km/h with non-independent type I35 rear PTO shaft, which rev. is 540r/min.