Blade and lawn mower including the same

A blade, including:

• a main body, including a body portion and an assembling portion which is connected to the body portion, the assembling portion configured for being disposed on a mowing disk of a lawn mower, the mowing disk being rotatable about an axial direction, the body portion including two side faces opposite to each other, each said side face having a curved section and a plane section, the two curved sections forming a head portion, the two plane sections forming a tail portion, on a rotation direction of the mowing disk, the head portion being leading in front of the tail portion, the head portion being relatively higher than the tail portion, the tail portion being tapered toward a direction away from the head portion, the two side faces defining a midline therebetween, the tail portion tilting upward toward the head portion, the midline and a vertical plane which is lateral to the axial direction defining an angle therebetween, the angle being between 10 and 20 degrees, the two curved sections and the two plane sections being respectively symmetrical to the midline, the two curved sections being convex.