The invention relates to a super ultrahigh efficient 5,500W four-grade energy-saving environmental-friendly electric motor which is characterized in that the inner and outer diameters and length sizes of stator and rotor cores, groove shapes and sizes of a stator and a rotor and a number of grooves are subjected to integral coordination design, so that loss of the stator, the rotor and the cores is greatly reduced; then punching holes are additionally formed in stator and rotor punches to form core hole passages, so that heat temperature convection in the motor is increased and temperature rise is reduced and retarded; specially-made rotor cast aluminium is adopted so as to effectively improve electric conductivity and a heat dissipation effect; a stator winding is tapped at the one second position of a coil so as to greatly reduce loss of a harmonic component, thereby further reducing iron loss and copper loss. A comprehensive effect of various schemes greatly reduces electric energy loss, so that on the premise of stabilizing an output power of the product into 5.5 kW, the input power of the product is only 5.962kW and energy conversion efficiency of the product reaches 92.3 percent, exceeds the national YE 4-grade energy efficiency standard which is the highest grade energy efficiency standard, also exceeds the international IE 4-grade standard which is the highest grade standard and reaches the international advanced level.