Limitation and freedom are not diametrically opposed, but intertwined and dialectically unified, which needs to be analyzed from the perspective of Marx. Human beings evolved from animals and have both natural and self-stipulation needs. Activities that meet the needs of nature are not free, even if they are subjective and voluntary. Activities that meet the needs of self-stipulation are free activities. The self-stipulation needs coexist with the natural-stipulation needs and regulate the natural-stipulation needs. If we break through the regulation of self-stipulation needs, the activities to meet the natural-stipulation needs are evil, and restricting the perpetrators is actually to help them recover freedom. At this time, limitation and freedom are the same. In addition to causing evil, natural-stipulation needs can also alienate free activities. But the nature of man's self-generation must be able to suppress evil, overcome alienation, and fill all fields of human beings with activities that meet the needs of self-stipulation, which is the realization of freedom.