Chinese ocean color and temperature （COCTS） was interfered by the unknown radiation of cold space when the satellite of HY-1B was in orbit， which causes its nine-year data to be affected to varying degrees. Using data with less impact on the two poles as samples， the response repair model based on recalibration coefficients and the non-uniform correction model based on probability distribution were established to repair the earth target signal， and the repair results were compared and optimized. The accuracy and stability of model were verified. The final results show that under the condition of the cold space radiation benchmark affected， the response repair model combined with the probability distribution correction model can obviously repair the data effectively.