The invention discloses an improved chilling-section enhanced heat transfer operation method which comprises the following steps: (1) closing a second regulating valve, a first hand valve and a second hand valve of a header pipe when a gasifier is started, opening a third hand valve of a first brunch pipe and a fourth hand valve of a second branch pipe, enabling boiler water to sequentially flow into a heat exchange pipe of the chilling section and a heat exchange pipe of a gas conveying duct section through a steam pocket, then enabling the boiler water to flow back to the steam packet through a gas outlet pipeline of the chilling section and a gas outlet pipeline of the gas conveying duct section; (2) opening the first hand valve and the second hand valve after the gasifier operates stably, gradually closing the regulating valve, slowly opening the second regulating valve of the header pipe, and observing the values displayed on a first water density meter on the gas outlet pipeline of the chilling section and a second water density meter on the gas outlet pipeline of the gas conveying duct section while the second regulating valve is opened, and regulating the water inflow of a first branch and a second branch. Through the adoption of the method, the temperature of a superheat section is reduced by 30 DEG C, and the load of the gasifier is increased by about 3%.