ABSTRACT
<p><b>OBJECTIVE</b>To explore the effect of the improved plastic and reconstruction of the anus in situ.</p><p><b>METHODS</b>Improved plastic and reconstruction of anus in situ was performed in 38 cases of low rectal cancers operated while Miles radical operation. Improvement includes: (1) The internal sphincter was rebuilt with 4 layers of muscle layer of the endmost of colon. (2) The last of gracilis was divided into 2 parts to reconstruct the superficial part and deep part of external sphincter muscle. (3) The rectum cape improvement is to firmly stitch the levator ani outside the external sphincter muscle in front of the colon. (4) The rectum valve is improved into three artificial rectum valves.</p><p><b>RESULTS</b>The form and function and their long term survival rate were good, the rate of superior anus function was 94.73%.</p><p><b>CONCLUSION</b>It mains the results of improved plastic and reconstruction of anus in situ is near that of normal persons.</p>