AppendTo[$Path, \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0\\SpinDynamica\\"]
out=
{"E:\\Mathematica\\12.1\\AddOns\\Applications", \
"C:\\Users\\a1311\\AppData\\Roaming\\Mathematica\\\
DocumentationIndices", "e:\\Mathematica\\12.1\\SystemFiles\\Links", \
"C:\\Users\\a1311\\AppData\\Roaming\\Mathematica\\Kernel", "C:\\Users\
\\a1311\\AppData\\Roaming\\Mathematica\\Autoload", \
"C:\\Users\\a1311\\AppData\\Roaming\\Mathematica\\Applications", \
"C:\\ProgramData\\Mathematica\\Kernel", "C:\\ProgramData\\Mathematica\
\\Autoload", "C:\\ProgramData\\Mathematica\\Applications", ".", \
"C:\\Users\\a1311", "e:\\Mathematica\\12.1\\AddOns\\Packages", \
"e:\\Mathematica\\12.1\\SystemFiles\\Autoload", \
"e:\\Mathematica\\12.1\\AddOns\\Autoload", \
"e:\\Mathematica\\12.1\\AddOns\\Applications", "e:\\Mathematica\\12.1\
\\AddOns\\ExtraPackages", "e:\\Mathematica\\12.1\\SystemFiles\\Kernel\
\\Packages", "e:\\Mathematica\\12.1\\Documentation\\English\\System", \
"e:\\Mathematica\\12.1\\SystemFiles\\Data\\ICC", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0\\SpinDynamica", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0\\SpinDynamica", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0\\SpinDynamica", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0\\SpinDynamica", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0\\SpinDynamica\\", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0\\", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0\\SpinDynamica", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0\\SpinDynamica\\", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0\\SpinDynamica\\", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0\\SpinDynamica\\", \
"C:\\Users\\a1311\\Desktop\\SDv3.7.0\\SDv3.7.0\\SpinDynamica\\"}
Needs["SpinDynamica`"]
无Out
但是 我用包里面的函数名都是蓝颜色的字符
这里是安装说明：
http://www.spindynamica.soton.ac.uk/about/setup/
小弟我整了老久了，望大佬指点迷津，先拜谢

重启软件，直接调用Get而非Needs，看看是什么效果