The invention relates to the technical field of cooking devices, and discloses a rice steamer convenient to adjust. The rice steamer comprises a base. A box is fixedly installed at the top end of the base. A cover plate is fixedly installed at the top end of the box. A water accumulation groove is formed in the top end of an inner cavity of the base. A drainage valve is fixedly installed on the side face of the base. The drainage valve is communicated with the bottom end of the side face of the water accumulation groove through a drainage pipe. A rice steaming cavity is formed in the middle of the box. The two sides of the rice steaming cavity are each fixedly provided with a thermal baffle. A layering plate is fixedly installed between the thermal baffles. A water accumulator located at the top end of the water accumulation groove is fixedly installed below the layering plate. The upper portion of the layering plate is fixedly sleeved with an exhaust pipe located inside the cover plate. According to the rice steamer convenient to adjust, by moving a moving block upwards and driving a sliding plate, a stretchable rod drives a sealing block to move upwards to open an air outlet of the exhaust pipe, water vapor inside the rice steaming cavity is exhausted, a user is prevented from being scalded when opening a cabinet door, and therefore the practicability of the rice steamer is improved.