After Prussia unified Germany through the dynasty war at the end of 19, it adopted the Constitution of the German Empire and the constitutional monarchy of the German Empire at 187 1 and established the capitalist system. But it has a strong military feudalism. After the industrial revolution, the reunification of the motherland and the establishment of the capital attention system provided a strong guarantee for Germany's rapid development in the world economy at that time. 1878 Bismarck officially launched the trade protection policy. It is under the guidance of this idea that after 1880, the German government began to consciously guide the development of heavy industry. Human and material resources are used more rationally under the guidance of the state. Electrical, chemical, railway, steel and other industries quickly jumped to the forefront of the world. This is the most effective means for Germany to quickly become an industrial power. 1889, the total industrial output value surpassed agriculture, and Germany became an industrial country. It took Britain nearly 100 years to complete the industrial revolution, and Germany took less than half the time.