本文采用组化肌球蛋白ＡＴＰ酶染色法检查了５例（男２、女３）双侧足主要内翻肌和外翻肌的肌纤维型构成和分布。结果表明：胫骨前肌Ⅰ型纤维平均比率为６７．４，其中浅部为６５．９，深部为６８．８，浅、深两部无统计学上差异（Ｐ＞０．０５），胫骨后肌Ⅰ型纤维占６２．４，与胫骨前肌相比，无显著性差异（Ｐ＞０．０５），腓骨长肌Ⅰ型纤维比率为６３．６，腓骨短肌为５６．２，两肌比较差异显著（Ｐ＜０．０５）。本文对各肌肌纤维型分布，结合肌电图原理从它们的功能上进行了探讨。 In this study, myofibrillar type constitution and distribution of the major invertebrate and valgus muscles of 5 cases (male 2, female 3) were examined using histone myosin ATPase staining. The results showed that the average ratio of type Ⅰ fibers in anterior tibialis was 67.4, which was 65.9 in the shallow part and 68.8 in the deep part. There was no significant difference between the shallow part and the deep part (P> 0.05) Muscle type Ⅰ fibers accounted for 62.4, compared with the tibialis anterior muscle, there was no significant difference (P> 0.05), peroneal fibula type Ⅰ fiber ratio was 63.6, fibular short muscle was 56.2, The difference was significant (P <0.05). This article on the distribution of muscle fibers, combined with EMG principle from their function were discussed.