The Sino-US-Russia triangular space relationship is complex. USA and Russia had some wide-spread and in-depth space cooperation, China and the United States have little direct cooperation, and the cooperation between China and Russia develops steadily. Sino-US-Russia triangular space relationship is a non-equilateral triangle. The intense competition among three countries is determined by their different stra-tegic objectives. Space cooperation among the three countries does not overshadow the contest since the space is closely related to national security and economic interests, as well as international strategic stability and balance. In the future, the three countries will continue to compete fiercely in the space technology, which is irreversible, and China and Russia will strengthen cooperation against the United States' counter-space capabilities. In order to avoid the space crisis, the United States is supposed to establish and strength-en space security dialogue mechanism with Russia and China.%中美俄太空三角关系比较复杂。美俄太空合作有一定的广度和深度，而中美则几乎没有直接的太空合作，中俄太空合作稳步发展，逐渐深化，中美俄三对双边关系构成的三边关系是一个非等边的三角形。三国在太空领域激烈的竞争由三国不同的战略目标所决定，三国太空合作并没有掩盖三国在太空领域的较量。太空事关国家安全和经济利益，以及国际战略稳定与平衡，未来，三国将进一步强化太空技术的竞争，且趋势不可逆转；在反对美国太空霸权方面，中俄将联手对抗美国的反太空能力。为避免太空危机，美国尝试与中国和俄罗斯建立并加强太空安全对话机制。
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