"Industrial wiring" generally use in industrial circle for high pressure switchboard, low pressure switchboard, motor starters and control panel etc. assembly, and is one of the main events of vocational training. In traditional learning, teachers will explain the circuit and do the demonstration, and then students will proceed self study or practice etc training method. In this kind of method, students mostly can not prove immediately and cause inaccuracy with wiring concept. In view of digital teaching material is producing and developing maturely, and it has been promoted generally as a popular way for teaching. Digital learning's advantages include no time limit or space limit, saving the human recourse and consumables cost, and lively and abundant in teaching material. As a result, this research would put digital learning into industrial wiring course, to create digital teaching material to build up learning benefit result and to spirit up learning interest. This research takes 70 electric machinery and electron students from vocational high school and the experiment makes two people as a group to proceed academic and technical learning. During the experiment, 36 students will use computer simulated mode as digital learning, and the other 34 students learn by dictated demonstration in traditional learning way. After the class, the two groups of class take a quiz separately, including electrical science basic ability test, industrial wiring achievement test, cognition load chart and space ability test to comprehend the benefit result of applying digital learning. Students' composite grade indicates that digital learning (M=24.87) overmatch the traditional learning (M=19.63). Therefore could make four conclusions. First, digital learning benefit is better than traditional learning. Second, digital learning create a higher cognition load than traditional learning does. Third, digital learning's learning result does not have any difference for different space ability learner. Fourth, computer is a useful communication tool in digital learning and it helps to group interaction.