Braids had already been cut before the Qing Dynasty:

First of all, Xiaobian should explain that it was not after the demise of the Qing Dynasty that there was a behavior of braid cutting, and in the late Qing Dynasty, braid cutting has become a trend of thought and gradually moved towards movement. Kang Youwei once published an article proposing to cut braids under the leadership of the government during the period of the Penghu Reform Law, the main reason being that having braids is not conducive to industrial production, and to a large extent, it is unfavorable to China's modernization and industrialization. During the New Deal period at the end of the Qing Dynasty, braid cutting gradually became a new trend of thought, not only revolutionaries cutting braids, international students cutting braids, even many Qing Dynasty clans also cut braids, of course, the position and original intention of all parties to cut braids are definitely different.
Why don't the Han people cut their braids:
After the fall of the Qing Dynasty, the Nanjing Provisional Government first issued a braid-cutting order, advocating that the people of the whole country cut braids, under the call and promotion of the Nanjing Provisional Government, cutting braids became a national custom for a while, and the military and police also assumed the responsibility of supervising the cutting of braids, and even Yuan Shikai cut the braids in front of foreigners, which shows the intensity of the braid-cutting movement. But in such a big background, there are still many people who refuse to cut braids, and it is more paradoxical that it is understandable to say that the old and young of the Qing Dynasty still have braids, but many Han Chinese still have braids. The reason is that Xiaobian believes that this phenomenon is both psychological inertia and the manifestation of the inferiority of the Han people, after hundreds of years of rule, many people have become numb, and braids have become a habit. Of course, people like Gu Hongming still wear braids because he still adheres to Chinese traditions culturally, and he regards the demise of the Qing Dynasty and the abdication of the emperor as the end of traditional Chinese society, so in order to retain the tradition in his heart, he still keeps braids after the fall of the Qing Dynasty.
Why did the Manchus take the initiative to cut their braids:
On the contrary, many Manchus after the fall of the Qing Dynasty, they have taken the initiative to cut their braids, in fact, this has a lot to do with the national political situation at the time of the Xinhai Ding Revolution, although the Xinhai Revolution is china's version of the glorious revolution, but in fact in many parts of China, such as Xi'an, such as Jingzhou, such as Hangzhou, there have been Han massacres of Manchus, and at that time the consultation was not very smooth, so rumors flew all over the sky, the Manchus in order to protect themselves, on the one hand, gave up the Manchu surname, on the other hand cut the braids, At least it is guaranteed to be no different from the Han chinese in appearance.
Now there are many people, especially some young men, in order to be different, deliberately keep braids, this behavior is very undesirable, in order to cut off the braids, how much Chinese to pay a huge sacrifice.