Children who are mentally retarded often have language disorders that manifest themselves as non-speaking, late speaking and slurred speech, so how to teach such babies to learn to speak becomes a challenge for parents. Here are a few effective language training methods for parents to refer to. First, provide a language environment: children learn to speak, to have a suitable language environment, for this reason, to create sound and language environment for children with intellectual backwardness. Adults should often say what they are doing or seeing (for example: “I am cooking now”, “I am wiping the table”, I am serving you rice”, “so-and-so you are such a good boy that You can move the chair by yourself”, etc.), as well as saying what your child is doing (e.g., “You are building blocks”, “You are playing with the bar”, “You are drinking water”, etc.) Ask him questions often to motivate the child to respond and give opportunities for the child to talk. Second, lip-synching and imitation pronunciation: At the beginning, the adult pronounces the words and encourages the child to imitate them, only teaching the pronunciation of some titles, such as dad, mom, grandma, grandpa, etc. When teaching, the mouth shape should be exaggerated so that the child can see clearly when lip-synching. The training of mimicking pronunciation is boring, usually 5 minutes at a time, and can be interspersed with the imitation of animal calls and car horns to maintain children’s interest. Third, understand speech: mainly refers to the ability to link physical objects and speech. Adults show children pictures of people, vehicles, animals, furniture or people moving around, while asking: What kind of person is this? What kind of animal is this? What is this thing? What is this person doing? After several repetitions, ask the child to point out the corresponding person or object with his or her finger when he or she hears the adult say the name of the person or animal on the card, so that he or she can make a connection between the form and the sound. If children can identify the cards well, they can be taught to name them one by one, such as pointing to an object and asking, “What is this?” Immediately ask the child to imitate, you can induce him to “This is —-” to ask him to express the name of the object, such as a better ability to say individual words, we have to imitate it to say simple sentences, step by step. Children with intellectual backwardness tend to be less receptive, learning to speak will also be a difficult process, parents must have enough patience, believe that as long as you are willing to pay, you will be able to have a harvest.