The purpose of this article is to analyze the clinical manifestations and pathological mechanism of surgical chronic wounds, and to standardize the nursing management of wounds. The implementation of positive psychological suggestion interventions on surgical patients can alleviate the patients' unhealthy psychology such as psychological anxiety and depression, and explore how wet therapy can improve the healing rate of wounds. The method in this paper is to use a random sample control method to classify 70 eligible postoperative patients, establish a control group and an intervention group, the intervention group is given positive psychological suggestion combined with wet therapy, and the control group uses normal nursing methods. Statistical analysis of various data of chronic wound recovery was performed on the two groups of patients in the experiment to explore the actual effect of psychological suggestion combined with wet treatment. Corresponding conclusions are drawn through data comparison. The results of the study indicate that the differences in the specific pathological conditions of the wounds are not statistically significant. The cure rate of the intervention group was 71.6%, which was significantly higher than that of the control group, 35.8%. The difference between the two groups was statistically significant. The average wound healing time of the intervention group was (6.2 ± 1.9) d, which saved a lot of time compared with the control group's (13.5 ± 2.1) d. Therefore, the positive hint that combined wet therapy has the advantages of improving the cure rate, shortening the average healing time of wounds, shortening the average length of hospital stay, and reducing the pain during dressing change compared with conventional nursing methods. Improving postoperative recovery methods will not only shorten the recovery process, but also have a positive impact on the recovery of patients' self-efficacy.