A tangential type permanent magnet rotor, comprising a rotor iron core and permanent magnets provided on the rotor iron core , wherein a width of one side, close to an outer edge of the rotor iron core , of each of the permanent magnets is H2; and a width of one side, close to a center of the rotor iron core , of each of the permanent magnets is H1, wherein H2>H1; a maximum included angle of a magnetic conductive passage between adjacent two permanent magnets is A2, and a minimum included angle of each of the permanent magnets is A1, A2≥A1; the A1 is an included angle of connecting lines that are respectively between two ends of a surface at one side, close to the outer edge of the rotor iron core , of each of the permanent magnets and the center of the rotor iron core ; the A2 is an included angle of connecting lines that are respectively between two ends of a surface at one side, close to the outer edge of the rotor iron core , of the magnetic conductive passage between the adjacent two permanent magnets and the center of the rotor iron core ; wherein A2≤1.6A1 wherein a cross section, perpendicular to an axial line of the tangential type permanent magnet rotor, of the each of the permanent magnets is of an isosceles trapezoid; an upper bottom of the isosceles trapezoid is provided at a side close to the center of the rotor iron core ; the each of the permanent magnets is of a centrosymmetric structure, characterized in that a center line of the each of the permanent magnets is a middle line of the isosceles trapezoid; the whole middle line of each of the permanent magnets is provided at a front side of a rotation direction of the tangential type permanent magnet rotor, such that the middle line does not cross the radius line of the rotor. a width of one side, close to an outer edge of the rotor iron core , of each of the permanent magnets is H2; and a width of one side, close to a center of the rotor iron core , of each of the permanent magnets is H1, wherein H2>H1; a maximum included angle of a magnetic conductive passage between adjacent two permanent magnets is A2, and a minimum included angle of each of the permanent magnets is A1, A2≥A1; the A1 is an included angle of connecting lines that are respectively between two ends of a surface at one side, close to the outer edge of the rotor iron core , of each of the permanent magnets and the center of the rotor iron core ; the A2 is an included angle of connecting lines that are respectively between two ends of a surface at one side, close to the outer edge of the rotor iron core , of the magnetic conductive passage between the adjacent two permanent magnets and the center of the rotor iron core ; wherein A2≤1.6A1 wherein a cross section, perpendicular to an axial line of the tangential type permanent magnet rotor, of the each of the permanent magnets is of an isosceles trapezoid; an upper bottom of the isosceles trapezoid is provided at a side close to the center of the rotor iron core ; the each of the permanent magnets is of a centrosymmetric structure, characterized in that a center line of the each of the permanent magnets is a middle line of the isosceles trapezoid; the whole middle line of each of the permanent magnets is provided at a front side of a rotation direction of the tangential type permanent magnet rotor, such that the middle line does not cross the radius line of the rotor. <EOS>