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The pruning of apple trees plays an important role in fruit set and tree shape. A five year old apple tree was selected as the research object, and the simulation model was established and compared with the actual results. First of all, the 3D laser scanner was used to scan the fruit trees after winter defoliation to obtain the point cloud data. After denoising, resampling and software processing, the skeleton nodes of apple trees were obtained to establish the apple tree structure model.Secondly, four different types of pruning treatments were carried out on apple trees. After one growth period, the growth data of the pruned branches were recorded, and the qualitative and quantitative analysis was carried out.The results showed that with the increase of fruit tree pruning, the latent bud rate and short branch rate decreased gradually, but the middle branch rate did not change significantly, but the long branch rate increased gradually.According to a parent type and each type after the corresponding branch pruning branches of the node changes, generating polynomial function corresponding to the mathematical rules for provide a virtual tree pruning simulation.Finally, the apple tree pruning simulation software for early fruit tree pruning simulation was established, a consistent change rule after pruning a simulation with actual results generated by pruning, pruning can provide for early fruit tree fruit or shaping reference for next year.