The utility model belongs to the technical field of farm tools in the agricultural production and provides a mechanical self-ploughing type multifunctional plough adapted to the ploughing operation for mountain slopes with the gradients thereof smaller than 40 degrees, plots and greenhouse orchards, wherein the plough is operated under the effects of both the prying force of a lever and the support and reverse-thrust force. The self-ploughing type multifunctional plough is characterized in that a ploughshare 1 is movably connected with a plough holder 2 and is positioned by means of a u-shaped sheet through the formation of a slipknot. The plough holder 2 is movably connected with the lower end of a prizing rod 4 by means of a welded iron sheet. The middle-lower part and the middle-upper part of the prizing rod 4 are movably connected with the front end of a linkage sheet 5 and the upper end of a connecting rod 7. The middle part and the tail part of the linkage sheet 5 are movably connected with one end of a telescopic adjusting rod 6 and the upper part of a support and reverse-thrust device 8. The other end of the telescopic adjusting rod 6 is movably connected with the welding sheet of the plough holder 2. The lower end of the connecting rod 7 is movably connected with the front end of the support and reverse-thrust device 8. In this way, a mechanical linkage mechanism driven by both the prying force of a lever and the support and reverse-thrust force is configured and the continuous forward ploughing of the plough is realized. The plough has the advantages of dual drive sources, highly-magnified laborsaving effect, long tillage stroke, smart operation and the like.