The invention discloses a compound type synergist capable of improving the utilization rate of a rice fertilizer. The compound type synergist is prepared from the following components in parts by weight: 50 to 55 parts of humic acid, 40 to 45 parts of silicon fertilizer, 2 to 3 parts of urease inhibitor and 2 to 3 parts of nitrification inhibitor. The compound type synergist disclosed by the invention has the advantages that the utilization rate is higher, the yield of rice can be increased, and the utilization rate of the fertilizer is improved; in addition, the quality of soil is favorably kept, barrier soil is improved, and convenience in use, no pollution or reside and low cost are realized.