The invention discloses an air compression efficient energy saver for braking and belongs to air braking equipment for vehicles. An electromagnetic coil is arranged outsides a pump shell; a protective shell is fixed to the pump shell; a filter is fixed at an air inlet formed in the lower end of the pump shell; an air outlet valve is fixed in a central hole of the pump shell; an iron core spring and an induction magnetic piston are arranged in the pump shell; the iron core spring presses on the induction magnetic piston; a sealing cap seals a channel, for air to enter, of an air inlet cavity; a sealing plate seals a channel, for the air to enter, of an extrusion cavity; a fixing plug is fixed in a plug hole in the induction magnetic piston; a sealing ball or a sealing cone is installed in an inner conical hole; and an accommodating hole is formed in the lower end of the induction magnetic piston. The air compression efficient energy saver for braking has a compact structure, is small in vibration, high in electrical energy utilization rate, strong in power, high in air compression efficiency, good in industrial market prospect and very convenient in both manufacturing and use and is suitable for being used for installing electric vehicles and internal combustion engine vehicles with air brake and can also normally compress the air to generate braking force after an internal combustion engine stops running.