Study the clinical features and imaging characteristics from conventional X ray examination of 68 patients with a perforated viscus by, the author have some results: The ratio of malelfemale was 2/1. Most of the patients were manual workers (77.1 percent), at working age (70.5 percent), living in the rural areas (73.6 percent) and hospitalized during 6 hours after onset (52.5 percent). About clinical features: the common functional symptoms were sudden and intense epigastric pain (78.7 percent), nausea or vomiting (73.8 percent). The common physical. symptoms have found that were fever (40.9 percent), pulsus celer (18.1 percent), abdominal distention (88.5 percent), absent liver dullness (72.1 percent). Most of patients with gastroduodenal perforation (78.4 percent). Blunt abdominal trauma usually caused small bowel perforation (80 percent). The conventional X ray image findings were Air crescent signs (free air patterns beneath diaphragm) seen on X ray films were 86.9 percent and they usually appeared on right or both sides, rarely on the left. Most of the patients were taken X ray examinations during 6 hours after onset (49.2 percent). The relationships between clinical features of perforated hollow viscuses and X-ray image findings have found that: There is 93.8 percent in case of sudden and intense epigastric pain and 91.1 percent in case of nausea or vomiting which have the prevalence of air crescent signs seen on X ray films and the same result for 95.5 percent in case of absent liver dullness and 92.3 percent in case of abdominal rigidity.