In recent years, as an emerging technology, block chain technology has been widely concerned by people from all walks of life. It has the advantages of distributed ledger technology, anonymization, strong stability and anti-tampering, which can effectively make up for the shortcomings of the existing technology. blockchain as a “machine of trust ” can allow trust to be passed and continuously generate new trust relationships, which makes it favored by insurance companies. But it is undeniable that the current blockchain, whether its technology itself or its application to the insurance industry, still faces great risks and challenges. In order for insurance institutions to return to the origin of risk protection, to play the role of economic "shock absorbers" and social "stabilizers", and to better provide risk protection and long-term stable funds for economic and social development, China should speed up the block chain related legislation, establish unified block chain rules, improve the regulatory system for block chain insurance transactions,thereby promoting the construction of a new insurance trading system and promote the rapid development of block chain technology.