A turbo lag boost compensation method comprising: calculating theoretical required boost torque Ts; determining required output boost torque Ts' according to a magnitude relationship between the theoretical required boost torque Ts and maximum torque Tpmax enabled to be output by a P2 motor; determining whether timing for turbo lag boost is activated; outputting the determined required output boost torque Ts' when the timing for the turbo lag boost is activated; and determining boost torque as zero when the timing for the turbo lag boost is not activated, characterized in that the timing for the turbo lag boost comprises a theoretical boost timing and an actual boost timing, and said determining whether timing for turbo lag boost is activated comprises: determining whether both the theoretical boost timing and the actual boost timing are activated, wherein said determining whether the actual boost timing is activated comprises: determining whether an entire vehicle is in a clutch start operating condition, when the vehicle goes from creeping to starting, determining not to activate the actual boost timing when it is determined that the entire vehicle is in the clutch start operating condition, and determining to activate the actual boost timing when it is determined that the entire vehicle is not in the clutch start operating condition, wherein said determining whether the theoretical boost timing is activated comprises: determining a boost interval value of a turbocharged engine under a current operating condition; comparing the required output boost torque Ts' with the boost interval value; determining to activate the theoretical boost timing when the required output boost torque Ts' > the boost interval value; determining not to activate the theoretical boost timing when the required output boost torque Ts' <, the boost interval value. calculating theoretical required boost torque Ts; determining required output boost torque Ts' according to a magnitude relationship between the theoretical required boost torque Ts and maximum torque Tpmax enabled to be output by a P2 motor; determining whether timing for turbo lag boost is activated; outputting the determined required output boost torque Ts' when the timing for the turbo lag boost is activated; and determining boost torque as zero when the timing for the turbo lag boost is not activated, characterized in that the timing for the turbo lag boost comprises a theoretical boost timing and an actual boost timing, and said determining whether timing for turbo lag boost is activated comprises: determining whether both the theoretical boost timing and the actual boost timing are activated, wherein said determining whether the actual boost timing is activated comprises: determining whether an entire vehicle is in a clutch start operating condition, when the vehicle goes from creeping to starting, determining not to activate the actual boost timing when it is determined that the entire vehicle is in the clutch start operating condition, and determining to activate the actual boost timing when it is determined that the entire vehicle is not in the clutch start operating condition, determining whether both the theoretical boost timing and the actual boost timing are activated, wherein said determining whether the actual boost timing is activated comprises: determining whether an entire vehicle is in a clutch start operating condition, when the vehicle goes from creeping to starting, determining not to activate the actual boost timing when it is determined that the entire vehicle is in the clutch start operating condition, and determining to activate the actual boost timing when it is determined that the entire vehicle is not in the clutch start operating condition,