To reduce the complexity and the overhead of the inter-operation in cyber-physical system based on the blockchain, a low-round communication verifiable data sharing mechanism and multi-party computing for collaboration is addressed. Based on the Shamir secret sharing algorithm, the sensing nodes can generate shares of any-degree polynomials of shared numbers in the data sharing mechanism, and the participating witness node is able to validate the shares generated by sensing nodes without interaction. To implement the proposed mechanism, a fully non-interactive secure multiparty computation for cyber-physical system is introduced seamlessly. With simplified communication process, different distributed nodes in the system can jointly obtain different degree negotiated function and each user node is able to validate the replies from the participating witness node. The performance analysis shows that only a low overhead is incurred by the secure collaboration based on the proposed secret sharing mechanism.