The invention provides a heat-insulated degradable polypropylene foaming material and a production method thereof. The heat-insulated degradable polypropylene foaming material comprises the following components in parts by weight: 60-85 parts of long-chain branched polypropylene resin, 0.1-30 parts of high-crystallization polypropylene resin, 0.1-10 parts of polyethylene resin, 0.1-5 parts of nucleating agent, 0.1-5 parts of antioxidant, 0-5 parts of coloring agent, 1-3 parts of slipping agent and 0.1-5 parts of chemical foaming agent, wherein according to the ISO 16790-2005 regulation, the long-chain branched polypropylene resin has melt strength of 30Pa.s-40Pa.s, a melting temperature of 160 EG C-240 DEG C, a branch chain carbon atom number of 20-30 and a molecular weight multi-dispersion index of 5.0-7.0, and is continuously produced by a two-order serial-connection extruder. During the preparation process, the physical foaming agent is added, wherein the physical foaming agent is one or more of carbon dioxide with a supercritical fluid form, nitrogen gas, helium gas, argon gas, hydrogen gas, pentane and butane; and the filling amount of the physical foaming agent is 1-10 parts.