The invention relates to an 800 MPa grade thin-specification hot rolled steel strip and a production method thereof. The hot rolled steel strip comprises, by mass, 0.05-0.09% of C, 1.70-1.90% of Mn, 0.05-0.15% of Si, no larger than 0.005% of S, no larger than 0.018% of P, 0.025-0.055% of Als, 0.050-0.065% of Nb, 0.090-0.110% of Ti, 0.10-0.15% of Mo, no larger than 0.0040% of N and the balance iron and inevitable microelements. The production method comprises the procedures of plate blank heating furnace heating, post-furnace descaling, rough rolling descaling, single-rack rough rolling, hot coil box treatment, finish rolling descaling, seven-rack finish rolling, laminar flow cooling and reeling. The hot rolled steel strip produced through the production method is no smaller than 800 MPa in yield strength, no smaller than 850 MPa in tensible strength, no smaller than 12% in ductility A80 and 1.5-3.0 mm in thickness, and the microscopic structures of the hot rolled steel strip are acicular ferrite and pearlite.