IPHONE text messages will be displayed simultaneously on the iPad. How to cancel?

First, iPhone and iPad use different Apple ID.

Second, turn off iMessage. Take the iPhone 7 as an example. The specific method is as follows:

1. First click the "Settings" icon on the phone desktop, as shown below.

2. After entering the phone setting interface, select the "Information" option from the drop-down menu, as shown in the figure below.

3. Finally, turn off the switch in the "iMessage" column in the information interface, as shown in the figure.