This paper takes the agricultural electricity load of Guangxi dragon fruit orchard as the background, and constructs a model of light storage and load energy system in agricultural parks. The model comprehensively considers the load characteristics of the speciality agricultural park that are levelable, adjustable and cuttable. A multi-objective optimisation model of the park was established with the objectives of minimising the operating cost of the park and maximising the consumption of new energy, studying the characteristics of supplemental irrigation required for the growth of agricultural orchards, establishing the relevant load regulation model and constraints of the park, solving the model using the Cplex solver in MATLAB, and mapping out the Pareto frontiers by the all-over weighting method, and analysing the influence of the weights on the two objectives, Finally, based on the Pareto frontier diagram, the example is simulated and analysed by choosing appropriate weights, and the results show that it can significantly reduce the cost of power purchase in the park, promote the consumption of renewable energy, and achieve the coordinated operation of the park’s multiple energy sources.