With the development of blockchain technology, more and more different types of blockchains have emerged, and cross-chain technology has also developed accordingly. At present, many relatively mature cross-chain transaction methods have emerged. However, with the rapid development of quantum technology, the security of traditional cryptography is facing huge challenges. The commercialization of quantum may pose a threat to computer blockchain cross-chain transactions that currently widely use classical cryptography systems, especially the hash time locking contract(HTLC). The security of hash time locking relies on the collision resistance of the hash function, however the quantum algorithm Grove can speed up the exhaustive search and globally maximize the time to find hash collisions. This paper aims at the problem that the Kazakhstan time locking mechanism cannot withstand quantum attacks in traditional cross-chain transactions, and combines quantum communication technology to study a method that can not only ensure the safe transmission of hash values and original images, but also take into account the atomicity and security of the transaction, the Quantum hash time locking mechanism (Q-HTLC). Experimental results prove that Q-HTLC has good accuracy and operates stably under different network conditions, enhancing the overall security of cross-chain transactions.