Abstract: The temperature field in the plate type fuel and coolant is investigated. One of the typical IAEA-10 MW-MTR fuel and coolant channel is modeled and simulated with CFX-Fluent. Three different power distributions are considered, which are uniform distribution, higher central power distribution and lower central power distribution in the transverse direction of the fuel plate. Results indicated that there is a cooler coolant center near the corner of the channel, because of no heat generation in the structure plate and the transverse heat conduction. Suggestion is proposed, which is that the power distribution and heat conduction in the transverse direction in the fuel plat should be considered in the nuclear physics design, thermal-hydraulic design and safety analysis.