According to media reports, recently, the Bo'ai Primary School in Changzhou City, Jiangsu Province, issued a notice announcing that the "nine-point circuit breaker mechanism" for homework will be put into use this semester, that is, homework will be stopped unconditionally after 9 p.m., and unfinished homework will not be done the next day, in order to ensure students' adequate sleep. This move has attracted the attention of the majority of parents and once made it into the hot search list. Adequate sleep time is crucial to promote brain development, vision protection and learning ability and efficiency of primary and secondary school students. To this end, the Guidelines for Health Education in Primary and Secondary Schools issued by the Ministry of Education clearly stipulates that pupils should sleep 10 hours a day, junior high school students 9 hours and senior high school students 8 hours. Unfortunately, in reality, many children often suffer from severe sleep deprivation. Too much homework is the culprit that leads to late sleep, and the introduction of the "nine-point circuit breaker mechanism" is undoubtedly of great practical significance for ensuring children's sleep. However, the "nine-point circuit breaker mechanism" is not a radical solution. In order to make children sleep well, we should also start with the problem of reducing students' academic burden. To ensure that children have enough sleep, teachers and parents should take practical actions. On the one hand, the teacher should assign a proper amount of homework, do not assign a large number of mechanical and repetitive rigid homework, avoid "problem sea tactics", and achieve "reduce quantity and improve quality"; On the other hand, parents should not have a competitive mentality, do not cause pressure on children, or even add extra burden. The operation of the "nine-point circuit breaker mechanism" in primary schools is only a good start, and there are still many things to follow up and implement. Teachers should have a correct view of students' academic achievements, parents should have a correct childcare concept, and more importantly, establish and improve a scientific assessment and evaluation mechanism, incorporate students' comprehensive development into the school education assessment system, and make the pursuit of green enrollment rate a consensus of the whole society, so as to fundamentally solve the problem. (Outlook New Era)