The crux of injection mold manufacturing optimize scheduling is the job time dispatching in operation level. In the injection mold manufacturing process, many factors should be considered. The holiday arrangement and the machine’s duty time policy should be calculated in the searching of job time span. Generally, the different machine resources have the different duty time policies. So the available time span of machines is noncontinuous and the daily available time length is different. To a single mold part, the different operations may be made in different plant. The transportation time will change the scheduling result a lot. A Web Service is designed for the transportation time evaluation. An operation job time dispatching algorithm for injection mold manufacturing is proposed. It can be invoked to support the decoding of the GA chromosome representation.