The terminal of the virtual machine ubuntu18.04 system cannot paste the content copied from the windows side.

The solution is to install the VMtools tool first

Then run the command in the terminal:

sudo apt-get autoremove open-vm-tools //Uninstall existing tools
sudo apt-get install open-vm-tools //Install tools open-vm-tools
sudo apt-get install open-vm-tools-desktop // Install open-vm-tools-desktop

 the problem will be solved