Block chain transaction processing method, device, medium and system

The invention discloses a block chain transaction processing method, device, medium and system, and the method comprises the steps: receiving a plurality of parallel transaction requests, the transaction requests comprising a smart contract unique identifier; sending an acquisition instruction to the target block chain network based on the transaction request, and receiving a node topological relation returned by the target block chain network based on the acquisition instruction; a pre-established contract container scheduling prediction model is utilized, an optimal scheduling strategy is generated based on the multiple intelligent contract unique identifiers and the node topological relation, and the optimal scheduling strategy comprises a to-be-started contract container unique identifier and a corresponding intelligent contract; and sending a scheduling instruction to the target block chain network based on the optimal scheduling strategy, thereby enabling the target block chain network to start a corres