The electric heating element of the oven heating tube is a metal tube as the shell (iron, stainless steel, copper, etc.), and the spiral electric thermal alloy wire (nickel chromium, iron chromium alloy) is uniformly distributed along the central axis of the tube. The void is filled with the crystalline magnesia with good insulation and thermal conductivity, and the two ends of the tube are sealed with silicone and then processed by other processes. This oven grill heating element can heat air, metal molds and various liquids. The oven heating tube is used to heat the fluid by forced convection. It has the characteristics of simple structure, high mechanical strength, high thermal efficiency, safety and reliability, easy installation, long service life and so on.