Injection for treating mental disease

The invention relates to an injection for treating mental disease, and particularly relates to a freeze drying power-injection. The freeze drying power-injection contains a compound serving as an active ingredient and shown in the formula I shown in the description or pharmaceutically acceptable salts of the compound, mannitol and/or glycine serving as excipient and an optional pH conditioning agent, wherein the weight ratio of the excipient to the active ingredient is (1-1000): 1. The freeze drying power-injection has good stability.