The dual-station blow molding machine is designed with a precisely calculated die head flow channel, featuring a streamlined shape with no dead corners. This design allows for quick color changes and ensures low back pressure, effectively extending the lifespan of the extrusion system and gearbox. The multi-cavity die head of the blow molding machine has reasonably distributed flow channels, making it easy to adjust the flow rate. It uses a multi-layer co-extrusion die head with a heart-shaped flow channel. The dual-station blow molding machine employs a single-layer die head with a dual-layer compensating distributor. All types of die heads can be equipped with a visible liquid level line design.