Under the background of energy saving, emission reduction and "double carbon" target, it is urgent to develop a type of inorganic composite polystyrene A class thermal insulation board integrated with diversified functions. Aerogels and porous zeolites possess porous structural characteristics and are excellent materials with low thermal conductivity coefficient. In this paper, aerogel-porous zeolite composite was firstly synthesized, and the influences of different dosages of EPS particles, aerogel-porous zeolite composite and modifying agent on the dry density, thermal conductivity, mechanical strength, fire prevention and waterproof performance of aerogel-porous zeolite composite loaded inorganic composite polystyrene insulation board (AIPIB) were comprehensively studied. AIPIB with dry density of 152 kg/m³, thermal conductivity coefficient of lower than 0.050 W/(m·K), combustion performance of class A, 14 d compressive strength of higher than 0.15 MPa, 7 d saturation absorption of less than 5% is achieved, and the interface bonding of AIPIB is good. Compared with the performance of the A class thermal insulation board specified in “Thermal composite polystyrene foam insulation board” (JG/T 536—2017), AIPIB has lower thermal conductivity coefficient, higher compressive strength, better waterproof and fire prevention performance, and the bonding performance between inorganic and organic component is good with outstanding comprehensive advantages.