The invention provides a method for preparing a beta-type amorphous endogenous composite through an iterative algorithm. The method is characterized by comprising the steps that A), ingredients of thebeta-type amorphous endogenous composite are designed according to the formula shown in the specification, the designed alloy ingredients are smelted and poured, the cast microstructure of an alloy is inspected, the distribution form of the beta phase is determined, and the ingredients of the beta phase are tested and recorded as the formula shown in the specification; and B), iteration continuesto be carried out till the difference between the two formulas shown in the specification is smaller than 3%, and the beta-type amorphous endogenous composite is obtained, wherein i is the number oftimes of iteration and is valued as an integer larger than 2, particularly, the ingredients of the amorphous endogenous composite are designed according to the manner of the formula shown in the specification, the designed alloy ingredients are smelted and poured, and the ingredients (see the formula in the specification) of the beta phase in the alloy are tested. According to the method, it is guaranteed that the basic ingredients of the developed beta-type amorphous endogenous composite are close to an initial Ti/Zr amorphous alloy, and high glass forming capacity is reserved; and meanwhilethe glass forming capacity of the prepared beta-type amorphous endogenous composite is reserved, and good plasticity is achieved.