The invention discloses a manufacturing method of a two-way heat exchange heater. The manufacturing method of the two-way heat exchange heater comprises the following steps that the step 1, an outer pipe assembly is manufactured; the step 2, a connecting pipe assembly is manufactured; the step 3, a two-way heat exchange heater body is manufactured; the step 4, the humidity is removed, and a ceramic insulation head is installed; the step 5, a connecting assembly is installed; the step 6, a pipe head and a temperature controller support are welded; the step 7, leakage detection of a product is conducted; the step 8, a terminal sheet is welded and fixed; and the step 9, laser marking of the required technical parameters is conducted. The manufacturing method of the two-way heat exchange heater has the advantages that the product quality is improved, the production cost is reduced, various working procedures are independent and have no interference with each other, and the manufacturing technology is simple.