Let ${\phi }_e\left(n\right)$ be generalized Euler function, where e and n are positive integers. The calculation formula of generalized Euler function ${\phi }_e\left(n\right)$ for different values of e is one of the most important contents in the study of the properties of generalized Euler function ${\phi }_e\left(n\right)$. Aiming at the problem of the calculation formula of the generalized Euler function ${\phi }_e\left(n\right)$, the accurate calculation formula of the generalized Euler function ${\phi }_{11}\left(n\right)$ was discussed mainly, and he accurate calculation formula of the generalized Euler function ${\phi }_{11}\left(n\right)$ was given for n takes some positive integers. In order to check the accuracy of the given calculation formula, it will be checked in combination with Python programming in the article.