The invention relates to preparation of matrix particles capable of producing degradable mulching films, in particular to alloy matrix particles for preparing the degradable mulching films. The alloy matrix particles for preparing the degradable mulching films comprises the following components in percentage by weight: 0.01 to 0.03 percent of tert-butyl peroxy isopropyl benzene, 1.50 to 2.25 percent of fumaric acid, 4.50 to 5.60 percent of microcrystalline wax, 3.60 to 5.40 percent of polyethylene wax, 3.00 to 4.20 percent of MG70, 9.00 to 13.0 percent of N210 and 68 to 80 percent of corn starch. The alloy matrix particles for preparing the degradable mulching films have the advantages that: the alloy matrix particles can be restructured with PE structures to form a network bridge, so the prepared mulching films can be degraded quite uniformly; the problem of balancing the water tolerance and the hydrophilicity is solved, so the prepared mulching films can be attached to the ground surface, are difficult to blow away by wind, and have better function when used as the mulching films; and the mulching films can be blown to the thickness of 0.005mm and have small specific gravity, so the same amount of raw materials can produce more mulching films.