Many business process operations are transactional workflow in LiaoHe River water environmental management system. In the traditional workflow system, concurrency control mainly based on the realization of accessing control on the shared data, using it process the transactional workflow would affect the efficiency of the system when some business process operations sustained for a long time. In this case, these processes hold the shared data for a long time, so other processes must wait. To solve the problem, this paper uses a similar thought of instructions pipelining in the processor to research a method of concurrency control on transactional workflow, and based on it the general design model is given. The workflows are highly scheduled wth the help of concurrency controler and the task manager. In the premise of the correct execution of workflow, the concept of constraint is introduced for the purpose of the concurrency control of transactional workflow, thereby the performance and efficiency of the system has improved.