Training evaluation is essentially a process in which enterprises use certain evaluation indicators and methods to check and evaluate the training effect according to the purpose and requirements of training. The training effect depends on every step in the training process, and the significance of training evaluation comes from the overall evaluation of the training process. Therefore, evaluation should be considered before, during and after the implementation of training programs, that is, evaluation should be divided into three stages: before, during and after training.

First of all, the evaluation before training can ensure that: ① the confirmation of training needs is scientific; ② Reasonable connection between training plan and actual demand; ③ It is helpful to realize the rational allocation of training resources; ④ Scientific measurement of training effect.

Secondly, the evaluation in training can ensure that: ① training activities are carried out as planned; ② Feedback of training implementation and adjustment of training plan; (3) We can find the shortage of training, sum up the lessons, so as to improve the future training and find new training needs, thus providing an important basis for the next round of training; ④ Process monitoring and evaluation is helpful to scientifically explain the actual effect of training.

Finally, the evaluation of training effect is helpful to: ① make a correct and reasonable judgment on the training effect, so as to know whether a project has reached its original goals and requirements; (2) Whether the improvement of trainees' knowledge and technical ability or the change of their behavior directly comes from the training itself; (3) It can check the cost-benefit of training and evaluate the expenditure benefit and income benefit of training activities, which is helpful to make the funds more reasonably distributed; ④ Being able to objectively evaluate the trainer's work; ⑤ It can provide necessary information for managers to make decisions.

In a word, training evaluation can not only adjust the current training activities, but also sum up experience and prepare for improving future training activities.