Abstract: Trust is a key factor in maintaining interpersonal interaction and ensuring social order. Compared with the ultra-stable interpersonal trust pattern in traditional societies, cyberspace, based on the characteristics of openness, anonymity and uncertainty, presents the tension between strong and weak trust, which tends to diversify and complicate the pattern of trust. The “empty field” of people under the abstract system, the weakening of self-regulation triggered by network anonymity, and the decline of regulatory effectiveness caused by spatial and temporal delocalization have further eroded the trust relationship in cyberspace, posing a challenge to the effective construction of the trust system in the cyber society. In light of the characteristics and realities of cyber trust, strategies such as adhering to the principle of moderation on the basis of prudence and rationality, strengthening the moral self-discipline and ethical self-awareness of the subjects, constructing a cyber ethical community, and perfecting the trust regulation mechanism and technical guarantee can provide positive assistance to the construction of trust in cyberspace.