照https://mirrors.tuna.tsinghua.edu.cn/help/anaconda/设置.condarc如下后下载速度依然很慢。
channels: - defaults show_channel_urls: true channel_alias: https://mirrors.tuna.tsinghua.edu.cn/anaconda default_channels: - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/pro - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2 custom_channels: conda-forge: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud msys2: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud bioconda: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud menpo: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud pytorch: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud simpleitk: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
后将 其中的 https 都换成 http 就可以了，原因未知。
channels: - defaults show_channel_urls: true channel_alias: http://mirrors.tuna.tsinghua.edu.cn/anaconda default_channels: - http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main - http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free - http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r - http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/pro - http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2 custom_channels: conda-forge: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud msys2: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud bioconda: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud menpo: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud pytorch: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud simpleitk: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud