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This paper explored the impact mechanism of knowledge-based APP sustainable usage intention through studying the operation and innovation of knowledge-based APP companies and guided improving content and enhancing user stickiness for knowledge-based APPs. Based on the expectation confirmation model, a model based on the theory of perceived value with the construct of sustainable usage intention was established. This study aimed to explore the factors in continuing to use knowledge-based apps, identify the relationship between influencing factors and sustainable usage intention, and search for countermeasures and suggestions for the continued development of application use policies. Four hundred and three completed survey questionnaires of Guizhou consumers were collected through the online WeChat platform by random sampling in April 2022. The results showed that perceived value, ease of use, usefulness, and entertainment significantly impact sustainable usage intention on knowledge-based Apps in Guizhou. This study further suggested that marketing policies were outlined to improve the users' attitudes.