The invention discloses a halogen-free flame-retardant compounded system for polyurethane. The halogen-free flame-retardant compounded system comprises the following raw materials in percentage by weight: 50-90% of diethyl aluminum hypophosphite, and 10-50% of a charring agent, wherein the charring agent is an insoluble and infusible crosslinked polymer, and a cross-linking point structure is shown in the following formula (I). The invention develops a novel halogen-free flame-retardant compounded system for polyurethane to overcome the defects of an existing flame-retardant system applied topolyurethane materials, and the halogen-free flame-retardant compounded system has the characteristics of no molten drop, high flame retardance, migration resistance, moisture absorption resistance, good compatibility with matrix polyurethane materials and the like, and can be used for preparing a halogen-free flame-retardant polyurethane material.