In order to accurately predict the length of secondary cable laying in substation construction project and avoid the problem of resource waste in engineering construction

a secondary cable path optimization model based on Dijkstra algorithm is established. Firstly

the path environment of the substation is modeled and a raster map is established.Secondly

the traditional Dijkstra

the improved Dijkstra and ant colony algorithm are used to carry out path planning on raster map respectively

and the experimental simulation and comparison are carried out.Finally

the simulation results show that the path length of the improved algorithm is 24.32% and 28.66% less than that of the traditional Dijkstra.It is 12.34% less than that of the ant colony algorithm

which provides some useful theoretical references for the secondary cable laying in the future substations.