Win10 install TeXLive2019

Go to the TeX Liveofficial website to download the iso installation package: Acquiring TeX Live as an ISO image
Clicking on the link in the above picture will select the appropriate mirror based on the network for us to download. My mirror is from Shanghai Jiaotong University: http://mirrors.sjtug.sjtu.edu.cn/ctan/systems/texlive/Images/
Click on the file in the picture above, although there is 3.3G, the download speed is super fast, don't worry at all!

Double-click the downloaded installation package to open the iso file as a disk drive.
Find the install-tl-advanced.batfile and run it as an administrator. Note: It must be run as an administrator, otherwise it cannot be selected 给所有用户安装.
The loading interface appears at the beginning, and then the installation configuration interface appears. You can customize the installation directory, I changed it to D:/textlive/2019. Moreover, it seems that the classification directory of 2019 cannot be removed, otherwise an error will be reported! And to create the texlive folder in advance.
Select Advanceand click in the new pop-up window Customize.
In order to streamline the configuration, set the supported language to Chinese and English. Click first to 无uncheck all languages, and then select Chinese and English. Note: Click OK to save the configuration.
Click OK to start the installation.
Screenshot of the installation process:
After installation, just click 关闭.

Reference link:
Windows10/Centos7 installation Texlive2019 steps
install_TeXLive2019.pdf