The invention discloses a comprehensive utilization efficiency evaluation method of a combined cooling heating and power system. Considering that heat supply, refrigeration working medium parameters and environment temperature in the actual operation process of the co-production system are all changed in a fluctuating mode, and the electricity price, the heat price and the cold price are greatly different according to different user sides and season time changes, the comprehensive utilization efficiency of the co-production system is calculated by adopting an interval rough number analytic hierarchy process, and the difference between different energies is measured by evaluating the energy weights in the indexes. The comprehensive evaluation indexes adopted by the method overcome the defect that a traditional evaluation model only considers the energy difference from one perspective, and the comprehensive utilization efficiency of the combined cooling heating and power generation system with the actual performance of the system can be reflected more truly and accurately.