My 47 days Shih tzu puppy doesn't sleep on his bed, je loves to sleep on the floor, is it normal?

Hello. Make sure the bed that you have provided is comfortable. Choose a perfect place for him to sleep, may be close to your bed or anyone whom he is more comfortable with. Give commands, use code words, if he does, paise him and give treats. You can make him sleep on bed by training him this way.