Magnetomotive engine

The invention discloses a magnetomotive engine, which does not violate the law of conservation of energy and is preferably designed but not limited to a horizontally opposed engine mode. An existing engine piston is replaced by a permanent magnet which does not need to consume energy and has the inherent characteristic of strong attraction to ferromagnetic substances, the polarity of an electromagnet is periodically changed in a simple and feasible mode, and a crankshaft is pushed and pulled to do work through attraction and repulsive force of the permanent magnet piston to the electromagnet. The power is in positive correlation with the magnetic field intensity, area and thickness of a single permanent magnet and the number of the permanent magnets, additional energy does not need to be consumed after starting by an initial external force, power can be continuously output, and the permanent magnet generator can be widely applied to engines needing to provide power, especially for the engines which cannot pro