The invention provides a shielding and air-pushing originating construction method for a tunnel through a mining method. The shielding and air-pushing originating construction method comprises the following steps that (S1) an air-pushing tunnel is excavated in a selected excavation surface in the excavation direction of a shielding machine by using the mining method; (S2) the tunnel face of the air-pushing tunnel is reinforced; (S3) a shielding guiding platform is constructed in the reverse direction of the excavation direction of the shielding machine at the position distanced first spacing from the tunnel face, and bean stones are stacked on the shielding guiding platform after constructing; (S4) the shielding machine performs air-pushing originating on the shielding guiding platform, and enters the air-pushing tunnel; (S5) shielding tube sheets are paved in the air-pushing tunnel by the shielding machine, a temporary sealing wall is constructed by being attached to the excavation surface so as to seal an air-pushing originating hole door, after each paving of the shielding tube sheets with the fixed ring number, and first slurry is injected into the hole wall among the shieldingtube sheets and the air-pushing tunnel; and (S6) the tunnel face is removed, and secondary originating of the shielding machine is completed in the air-pushing tunnel. By means of the shielding and air-pushing originating construction method, the problems of water leakage of the shielding-formed tunnel and follow-up settlement instability of the tunnel are solved.