The invention relates to a rice protein milk replacer for a piglet in a weaning period. The rice protein milk replacer is prepared from the following raw materials: rice protein powder, bean pulp, premix, a sweetening agent, a complex enzyme preparation and the like, wherein the raw materials in percentage by weight are specifically as follows: 55-60% of rice protein powder, 12-16% of bean pulp, 2-3% of soybean oil, 0.05-0.5% of the piglet complex enzyme preparation, 0.14-0.2% of a sweetener, 0.2-0.6% of a flavoring agent, 3-6% of whey powder, 4-5% of plasma protein powder, 0.1-0.2% of DL-methionine, 1-2% of L-threonine, 2-6% of glucose, 2-6% of the premix, 0.1-0.3% of choline chloride, 0.2-0.3% of edible salt, 1-3% parts of an acidification agent, 0.2-1% of a mildew removal agent, and 0.1-0.2% of an antioxidant. The feed is good in palatability, good in digestibility, capable of providing appropriate high-quality protein, easy to digest, obvious in food calling effect, and capable of effectively eliminating weaning stress reaction for the piglet, meanwhile enhancing immunity, and ensuring the survival rate of the piglet.