Advantages:

Decision Trees are easy to explain. It results in a set of rules. （容易解释）

It follows the same approach as humans generally follow while making decisions.

Interpretation of a complex Decision Tree model can be simplified by its visualizations. Even a naive person can understand logic.（复杂的决策树也容易可视化）

The Number of hyper-parameters to be tuned is almost null.

Disadvantages:

There is a high probability of overfitting in Decision Tree. （很容易过拟合）

Generally, it gives low prediction accuracy for a dataset as compared to other machine learning algorithms.（通常情况下精确度不如其他算法好）

Information gain in a decision tree with categorical variables gives a biased response for attributes with greater no. of categories.

Calculations can become complex when there are many class labels. （分类较多的是否计算比较复杂）