A separating type son-mother tube clamp comprises a base, a top protection cap, a son tube limiting clamp and a binding belt. The base is used for connecting a son tube with a mother tube. The top protection cap can be in butt connection with the inner side and the outer side of the base. The son tube limiting clamp is embedded into the base. The base and the top protection cap are connected together through the binding belt. The upper end and the lower end of the base are each provided with an arc limiting groove which is used for being matched with a seabed pipeline and contains the son tube limiting clamp. According to the separating type son-mother tube clamp, the son tube and the mother tube can be connected, meanwhile, adjustment can be carried out according to changes of the distance between the son tube and the mother tube, only one clamp is used for being applicable to connection of the son tube and the mother tube with various distances, and the problem that an existing clamp cannot be replaced is solved; meanwhile, limiting and protection can be provided for the son tube and the mother tube.