I believe that there is a high correlation between the IV and the mediator in your research model. The results indicated that you did not have an effective mediation model since your IV and mediator are overlapping.

非常感谢解答，但是我还是有疑问，意思是我的中介变量选的不好对吗？还有自变量和中介变量的相关性应该在哪个范围合适呢？麻烦帮我看一下我选的变量间的相关性。另外，有啥好的建议调整吗，论文进展到结果分析了呢


             |    mj       mr       mt       mp     mc    enga     perfor
-------------+---------------------------------------------------------------
         mj |   1.0000
             |
             |
         mr |   0.5953   1.0000
             |   0.0000
             |
         mt |   0.5000   0.6013   1.0000
             |   0.0000   0.0000
             |
         mp |   0.5416   0.7072   0.6536   1.0000
             |   0.0000   0.0000   0.0000
             |
         mc |   0.4172   0.5402   0.5840   0.5676   1.0000
             |   0.0000   0.0000   0.0000   0.0000
             |
中介 enga |   0.4459   0.5782   0.5515   0.5939   0.6564   1.0000
             |   0.0000   0.0000   0.0000   0.0000   0.0000
             |
因perfor |   0.3718   0.4799   0.4680   0.5193   0.4616   0.7272   1.0000
             |   0.0000   0.0000   0.0000   0.0000   0.0000   0.0000

前五个都是自变量

Thanks for sharing your correlations

1. Having a look on the correlations among the IVs, the results actually reflect high correlations among your IVs.

2. The inter-correlations among your IVs are higher than that of the inter-correlations among IVs and the DV.

My suggestions:

1. Delete the construct which has the highest correlation - such as mr or mt !

2. or create a second-order construct that includes all IVs as the first-order constructs.

The second approach could possibly solve your problem since it reduces the threat of collinearity; however, I am not sure if you can justify the development of a second-order construct in your model based on your current theory or not. Thanks !  

非常感谢你的分析和建议，对我帮助很大，自变量间可能确实存在共线性的问题，限于问卷变量的设置，看来只能从自变量结构上调整了。另外，我看温忠麟有一篇文章《中介效应分析_方法和模型发展_温忠麟》在中介效应检验中提到了这种情况存在遮掩效应，不知道你对这个了解吗，求解。。