LNG water bath reheater, comprising a middle cylinder and cover plates at both ends. The cylinder is equipped with a coil, and the inlet and outlet of the coil pass through the cover plate at the upper end. The cylinder is equipped with a liquid level thermometer, a thermometer, an explosion-proof junction box, a drainage port, an overflow port, and a heater installation port. The drainage port is located at the lower part of the cylinder, and the overflow port is located at the upper part of the cylinder. The heater installation port is equipped with aElectric heaterThe upper cover plate is equipped with a water inlet and a temperature transmitter installation port. The advantage of this utility model is that it uses hot water to heat the gaseous natural gas flowing out of the air temperature gasifier, solving the problem of temperature not meeting the standard in winter weather; Simple structure, easy manufacturing, and good heating effect; In situations with high dust, it can prevent dust from entering the cylinder through the water inlet, polluting the water quality and affecting the heating effect.