Photon、dark matter、electromagnet wave conduction medium、cosmic dust, between them inner link is a urgent research major issues. Photon characteristics research is bear brunt. In 1919, British scientist Eddington organized a total solar eclipse big observation. Observed data confirm that photon trajectory is arc. From then on, opened the relativity era. Magneton Theory think, photon trajectory bend is photon spin and environmental magnet field combined action result. According to Magneton Theory, conceived a new experiment. This experimental results exact simple proved following conclusions: 1. In most cases, photon trajectory is arc. 2. Photon trajectory curvature radius inversely proportional to beam frequency. 3. Under special conditions, photon trajectory is straight line. 4. Photon trajectory bend has nothing to do with gravity. This experiment would prompt world to re-examine the relativity. This experiment will also open physical theory new era.