[Objective] The health of the grassland ecosystem before and after grazing in the Altay forest area was assessed, in order to provide a scientific basis for the restoration and management of degraded grassland in the area.[Methods] The VOR ecosystem health evaluation model was used combined the Margalef richness index, Simpson dominance index, Shannon-Wiener diversity index, and Alatalo evenness index to evaluate the overall status of the grassland ecosystem in the Aletai forest area.[Results] ① The Margalef index of each monitoring point was high significantly different before and after grazing in tourist areas (p<0.01), and was significantly different before and after grazing in pastoral roads (p<0.05); The Simpson index and Shannon-Wiener index of the front mountain slopes and pastoral roads showed extremely significant differences before and after grazing (p<0.01); The Altalo index of each monitoring site had no significant difference before and after grazing. ② The structure of the grassland ecosystem after grazing in the Aletai forest area was relatively stable; The organizational strength (O) and the resilience (R) value of the healthy grassland ecosystem before and after grazing in the Aletai forest area were significantly different (p<0.05). ③ The VOR index showed that the difference before and after grazing was extremely significant (p<0.01), while the VOR index of other monitoring points had no significant difference. ④ The evaluation results of the health status of the grassland before and after grazing at each monitoring point were consistent, which was a "healthy" state, but the VOR composite index value of each monitoring point was different.[Conclusion] The grassland ecosystem structure is relatively stable after grazing in the Aletai forest area. The Margalef abundance in the tourist area of the monitoring point is significantly different before and after grazing (p<0.01). The Simpson dominance and Shannon-Wiener diversity of the front mountain slopes and pastoral roads are all different before and after grazing. The health status of the grassland before and after grazing at each monitoring point was evaluated as "healthy".