With the rapid development of industry and the enhancement of comprehensive national strength, the Soviet Union began to pay attention to popularizing basic education. On August 14, 1930, the Central Executive Committee and the Soviet People's Committee issued the Decision on Popularizing Compulsory Primary Education, which clearly stipulated that all school-age children must receive four-year compulsory education, and since 1937, seven-year compulsory education has been popularized throughout the country. More and more children have returned to school, and the external conditions for the return of school uniforms have gradually matured.

In 1949, the Soviet Union issued a new regulation requiring students to be dressing the. If the school uniform in the past was to highlight class identity, then the mission of the new school uniform is to serve the public and belong to all students. Promoting dressing the nationwide will not only help students to build a collective consciousness, but also urge them to concentrate on their studies and work instead of spending too much time dressing up.

On the basis of retaining the combination of dress and apron, women's school uniforms introduce detachable collars and cuffs. The colors symbolizing different ages are replaced by uniform dark brown (this low-key color helps students concentrate). The length of the dress has changed, from the long skirt that didn't reach the ankle in the past to a little higher than the knee, in order to facilitate students' activities. As for the apron, the old habits have been continued. Female students wear black on weekdays and white on holidays and important occasions. For female students, in addition to uniform clothing standards, the new regulations also put forward strict requirements for hairstyles: female students' hair must be braided and decorated with bows and ribbons, but it must match the color of aprons. Through standardized mass production, new school uniforms quickly spread all over the shops in the Soviet Union, and the low price was affordable for almost any family. However, for some less wealthy families, it is still not cheap to change school uniforms once a year, so they usually buy a bigger size, which can last at least a few years.