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.