Greenhouse-King Series tractors are designed for greenhouses and gardens specially. It is directly connected with double-cylinder engine. It has jaw type differential lock, single-side brake and dual-speed PTO. The outside is low, short and narrow, so it has compact structure and small radius of turning circle. The oversize even is smaller than single-engine tractor. When work in ordinary greenhouses, it can plough freely and without dead angle. Their depth of plough and degree of rotary smash are better than ordinary single-engine four-wheeled tractor of farm managing machine. The work efficiency is high and the working quality is good. With different implements, the tractor can accomplish different kinds of works, such as plough, fertilization, crushing, spray, etc. in vegetable and flower greenhouses or gardens. And also, this tractor has all the other functions as other tractors. It is an ideal machine for greenhouses and gardens.