The invention belongs to the technical field of accessories of rotary cultivators, and particularly relates to an angular gear. The angular gear solves the technical problems that the design is not reasonable enough in the prior art. The angular gear comprises a gear body, wherein a plurality of oblique teeth are circumferentially and uniformly distributed on the gear body, and a center hole is formed in an axial center of the gear body. The angular gear is characterized in that the gear body is made of plastic; a plurality of through holes positioned between the oblique teeth and the center hole and distributed circumferentially and uniformly are formed in the gear body; an annular groove is formed in one end face of the gear body; the through holes are communicated with the annular groove; and the width and the depth of the annular groove are 3-7mm. Compared with the prior art, the angular gear has the advantages that the angular gear is more reasonable in design, light in weight and simple in structure, can meet an operation requirement, and corresponds with a trend of technology development in the current society.