This paper aims to explore the effects of psychological factors of personality type and decision-making style on non-rational financial behavior. It is committed to disclose individual differences in non-rational financial behavior caused by individual differences in personality type and decision-making style. Personality type, decision-making style and non-rational financial behavior are measured by the method of questionnaire. Significant differences are found in this study that different non-rational financial behavior are with different personality types and decision-making styles. It is also found that personality type and decision-making style have significant prediction to different non-rational financial behavior and their whole. The rational style, the spontaneous style and the dependent style in decision-making style and the sensing-intuition dichotomy of personality are significantly predictive to the total non-rational financial behavior respectively.