The invention discloses a 
big data-based electric cable well state evaluation and early warning method, comprising the following steps: 
processing data collected in real time to obtain a new trainingsample 
data set; performing running state evaluation on the data to obtain a comprehensive 
score of the 
current electric cable well running state; assessing the 
risk level of the 
current electric cable well running state according to the comprehensive 
score; and carrying out displaying and warning by an operation 
control system according to an assessment result. According to the method in the invention, multiple indicators affecting the running state of the electric cable well are firstly selected and synthesized through a 
principal component analysis method so as to obtain a new training sample 
data set, and then, a 
gene expression 
programming algorithm is used for mining a 
functional relationship between the comprehensive 
score and each index data, and finally, the 
current electric cablewell running state data is taken as the input of the 
functional relationship to calculate the comprehensive score, the calculation result is submitted to a risk early warning module, a 
risk level knowledge rule base is queried to evaluate the 
risk level of the current electric cable well running state, and feasible reference comments are given out.