Calculating method for adsorption output contribution rate of shale gas well

The invention discloses a calculating method for an adsorption output contribution rate of a shale gas well, and relates to the field of shale gas. The calculating method comprises the following steps: S1, searching various different gas state equations, and processing processes of calculating compression factors for the various gas state equations to obtain processed results of compression factors at different temperatures under different pressure; S2, performing comparison treatment on the processed results of the compression factors at different temperatures under different pressure, and selecting gas state equations with high precision; S3, basically setting a shale gas multi-section fractured horizontal well; S4, establishing a stratum pressure model for the shale gas multi-section fractured horizontal well for the shale gas multi-section fractured horizontal well according to the results of the compression factors; S5, establishing an adsorption gas and free gas input-output model for the shale gas mult