how to cut square tube 45 degrees?

To cut the 45 degree square pipe, you can use the following methods:
Use a CNC cutting machine:
First, make sure that the cutting parameters of the CNC cutting machine (such as cutting speed, cutting air pressure, equipment tension, etc.) meet the needs of cutting square tubes.
Use professional software for the design of the cutting path to ensure that the cutting angle is accurate to 45 degrees.
Place the square tube and start the CNC cutting machine to start cutting.
Manual sawing:
If the size of the square tube is not big, you can consider using a manual electric saw or saw blade for sawing.
Before sawing, the square tube needs to be fixed on a stable table to ensure that it will not move during the sawing process.
Use a cutting line to draw a 45-degree cut mark and then proceed with the sawing step-by-step.
Safety Precautions:
Wear appropriate personal protective equipment such as safety glasses, gloves and earplugs when operating.
Follow safety procedures to ensure a safe working environment.