Abstract: Aiming at the problems existing in the classroom teaching evaluation in higher vocational colleges, based on teaching evaluation system research of the early knowledge chain track and core skill coupling, to track students’ understanding and mastery of knowledge points and skill points of classroom teaching process is put forward to form the feedback mechanism and achieve the goal of improve the effect of classroom teaching. Taking the core course Hydraulic Structure of Water Conservancy and Hydropower Construction Engineering specialty of Yellow River Conservancy Technical Institute as an example, the assessment time, method and evaluation standard of all knowledge points, knowledge rings, knowledge chains and core skill chains of the course are established to promote the cultivation of students core skills by means of knowledge chain tracking. The case study show that this teaching evaluation system can reflect the students cognitive regularity, evaluation process can keep up with master schedule of students’practical skills, the evaluation data can facilitate teachers and students to find problems, the evaluation results have the feedback excitation teaching effects, which help to realize the entire, scientific, dynamic tracking purpose of the classroom teaching evaluation.