High-performance composite modified asphalt

The invention discloses high-performance composite modified asphalt which comprises the following components in parts by weight: 700-950 parts of matrix asphalt, 30-90 parts of ammonium polyphosphate,10-30 parts of pentaerythritol, 10-60 parts of a first modifier, 10-60 parts of a second modifier, 1-30 parts of a third modifier, 5-30 parts of sodium lignin sulfate, 1-5 parts of a stabilizer, 100-200 parts of lake asphalt, 10-50 parts of furfural extract oil, 3-20 parts of an emulsifier, 1-2 parts of an additive and a proper amount of water. The material of the first modifier is a PG graded composite asphalt modifier, and the material of the second modifier is LG501SBS. The purpose of good wear resistance is achieved, damage in the using process is effectively avoided, trouble brought to auser is avoided accordingly, the experience feeling of the user on asphalt is improved, the requirements of the current market are met, the practicability and usability of the asphalt are improved, and the problem that previo