Objective:To explore the new methods of diagnosis and treatment for malignant peritoneum mesothlioma(MPM). Methods:8 cases about the clinical feature,lab checking special checking and other diagnosis procedures and the methods for treatment were retrospectedand analyzed. Results: B-ul trasonic, CT, the ascites were founded to be positive with quite a few cases. Several cases were earned to last diagnosis by abdominal incision and probing. For the 8 cases, Only one survived two years, the others were all dead in one year.Conclusion:There are no special diagnosis measures for MPM up to now.The ascites,laparoscope are valuable.The effect for remedy and prognosis has something to do with its biological character, the prognosis is a little better if the histopathology is localized, Yet the diffusion is dreadful.